16 results about "Tobramycinum" patented technology

This invention provides a method and a production strain for increasing the yield of carbamoyl tobramycin, belonging to the field of genetic engineering technology. By knocking out the tobR gene, which encodes an Lrp / AsnC family transcriptional regulator, within the tobramycin synthesis gene cluster region of the *Streptoalloteichus tenebrarius* genome, and by overexpressing the tobO gene, which encodes a TauD / TfdA family oxidase directly acted upon by TobR, using a constitutive strong promoter, a hybrid mutant strain was obtained, exhibiting a significantly increased fermentation yield of carbamoyl tobramycin. The shake-flask fermentation level of carbamoyl tobramycin by this hybrid mutant strain reached 3.76 g / L, a 42.5% increase compared to the 2.64 g / L of the starting strain. The advantages of this invention are: by inactivating the tobR gene and simultaneously overexpressing the tobO gene in *S. tenebrarius*, a high-yielding carbamoyl tobramycin strain was constructed. This strain can increase the fermentation yield of carbamoyl tobramycin without increasing the cost of additional culture medium, thus reducing production costs and showing significant industrial application potential.

The invention relates to a method for determining the content of tobramycin in tobramycin eye drops, which comprises the following steps: 1) preparation of a reference substance solution: taking a tobramycin reference substance, and adding water and sulfuric acid to dissolve the tobramycin reference substance to prepare the reference substance solution; 2) preparation of a test solution: diluting tobramycin eye drops with water to prepare a reference solution; 3) preparation of derivatization solutions: respectively adding the reference substance solution and the test substance solution into a 2, 4-dinitrofluorophenethyl alcohol solution and a tris (hydroxymethyl) aminomethane solution for reaction, and adding acetonitrile after the reaction is completed to prepare a reference substance derivatization solution and a test substance derivatization solution; and 4) determination: taking the reference substance derivatization solution and the test sample derivatization solution, respectively injecting into a high performance liquid chromatograph to obtain chromatograms, and calculating the tobramycin content by using an external standard method according to the peak area of the chromatograms.

The invention discloses a fixing material for a medical device implant and a preparation method of the fixing material. The fixing material comprises a degradable polymer base material with a porous structure and a drug sustained-release coating uniformly loaded on the degradable polymer base material, holes in the degradable polymer are uniformly distributed in a staggered array manner, the holes are circular, the aperture of each hole is 0.5-3.0 mm, and the distance between every two adjacent holes is 0.5-3.0 mm; the drug sustained-release coating contains antibiotics; the antibiotics comprise rifampicin, minocycline hydrochloride, vancomycin, tobramycin, gentamicin and the like. The fixing material disclosed by the invention takes the degradable polymer as a base material, and the drug-loading coating containing antibiotics and anti-inflammatory substances is loaded on the surface, so that slow release of antibiotic drugs can be realized, and the fixing material has excellent antibacterial and anti-inflammatory performance and complete absorbability in a biological environment; and the problems of biocompatibility, infection risk and secondary operation removal of the implant for a long time are solved.

This invention relates to the field of pharmaceutical analysis technology, and more particularly to a method for detecting tobramycin-related substances in tobramycin products. The detection method provided by this invention utilizes HPLC-CAD to detect tobramycin-related substances. Based on the concept of quality analysis originating from design, it establishes a stable and reliable analytical method operation design region by systematically identifying and optimizing key method parameters. This overcomes the problems of low sensitivity, complex operation, and insufficient robustness in existing technologies, achieving rapid, accurate, and repeatable detection of related substances in tobramycin raw materials and their preparations.

The invention belongs to the field of chemical analysis and testing, and particularly relates to a quinoline derivative coumarin fluorescent probe targeting tobramycin and a preparation method of the quinoline derivative coumarin fluorescent probe. The preparation method comprises the following steps: dissolving N1-(7-chloroquinoline-4-yl) ethane-1, 2-diamine and 7-(diethylamino) coumarin-3-formic acid in dichloromethane, adding condensing agents of 1-hydroxybenzotriazole (HOBT), 1-ethyl-(3-dimethylamino aldehyde) carbodiimide hydrochloride (EDCI) and triethylamine, carrying out a stirring reaction at room temperature, carrying out separation and purification on an obtained crude product through silica gel column chromatography, and carrying out recrystallization to obtain the 7-(diethylamino) coumarin-3-carboxylic acid-N-(7-chloroquinoline-4-yl) coumarin-3-carboxylic acid-N-(7-chloroquinoline-4-yl) coumarin-3-carboxylic acid-N-(7-chloroquinoline-4-yl) coumarin-3-carboxylic acid. The coumarin fluorescent probe DL containing the quinoline derivatives is obtained. The prepared coumarin fluorescent probe forms a complex under the participation of Cu < 2 + >, and tobramycin can be specifically and rapidly detected in deionized water.

The application discloses an analysis method of tobramycin sulfate injection and application thereof, and the analysis method comprises the following steps: performing a pre-column derivatization reaction on a sample containing tobramycin and impurities by using a derivatization reagent, and then performing high performance liquid chromatography analysis on the sample after derivatization. The analysis is performed by gradient elution of a mobile phase A and a mobile phase B composed of water, acetonitrile and phosphoric acid, wherein the content of acetonitrile in the mobile phase B is higher than that in the mobile phase A, and effective separation of tobramycin and related impurities is realized by multi-stage gradient elution. The method can simultaneously separate and detect process impurities, degradation impurities and unknown impurities, has good separation degree and stability indicating capacity, and is suitable for quality control and drug stability research of tobramycin sulfate injection.

This invention relates to a tobramycin eye drop. Specifically, this invention provides a tobramycin eye drop comprising tobramycin, polyethylene glycol 400, glycerin, sorbitol, alanine, hydroxypropyl cellulose, sodium dihydrogen phosphate, disodium hydrogen phosphate, and water. The tobramycin eye drop of this invention has the advantage of low ocular irritation, significantly improving ocular drug administration compliance. Furthermore, the tobramycin eye drop of this invention exhibits excellent light and high-temperature stability, ensuring the quality and safety of the tobramycin eye drop, thereby enhancing its application value.

The application provides a method for improving the fermentation yield of a carbamoyl tobramycin production strain. The method improves the fermentation medium of the carbamoyl tobramycin production strain, and the improved fermentation medium is added with a glucose isomerization product or uses the glucose isomerization product to partially replace the glucose in the original fermentation medium. After the method is used, the shake flask fermentation yield of the same strain is increased from 3.5 g / L to 3.91 g / L, and the yield is increased by 11.7%. The application improves the fermentation yield of carbamoyl tobramycin on the basis of fine-tuning the fermentation medium formula, and does not increase the additional fermentation cost, so the application has important industrial application prospects.

The invention relates to a compound medicine for treating vulva lichen sclerosus. The compound medicine is prepared from methylrosanilinium chloride, aminoglycoside antibiotics, glucocorticoid, pyrrole broad-spectrum antifungal drugs and pharmaceutic adjuvants. The aminoglycoside antibiotic is tobramycin, the glucocorticoid is dexamethasone, and the pyrrole broad-spectrum antifungal drug is clotrimazole. The compound medicine is ointment or water aqua.

This invention relates to a method for preparing tobramycin sulfate, comprising: S1, acidifying carbamoyl tobramycin fermentation broth, adsorbing it with a first cation exchange resin, sieving and washing it, packing it into a column, then eluting it with a first ammonia solution, while simultaneously decolorizing it with a decolorizing resin column in series, and collecting the eluent rich in carbamoyl tobramycin; S2, hydrolyzing the eluent rich in carbamoyl tobramycin under alkaline conditions to obtain a tobramycin hydrolysate; S3, adjusting the pH of the tobramycin hydrolysate to neutral, adsorbing it with a second cation exchange resin column, washing it with water, and then sequentially eluting it with a second ammonia solution of first, second, and third concentrations, collecting the eluent rich in tobramycin, concentrating it by nanofiltration, salting it, decolorizing it with activated carbon, and spray drying it to obtain the tobramycin sulfate; the first concentration is 0.05~0.1 mol / L, the ratio of the second concentration to the first concentration is 1.5~2, and the ratio of the third concentration to the second concentration is 1.2~1.5. The tobramycin sulfate prepared by the method of this invention has a purity ≥99% and a yield ≥50%.

The invention relates to an ophthalmic medicament for neurotrophic eye diseases of pets and a preparation method and application thereof.The ophthalmic medicament comprises the active ingredients of cat nerve growth factors and tobramycin, and in the ophthalmic medicament, the concentration of the cat nerve growth factors is 60-150 micrograms / mL; the weight percentage of the tobramycin is 0.2-0.5%, the nucleotide sequence for coding the cat nerve growth factor is shown as SEQ ID NO: 1 or SEQ ID NO: 7, the cat nerve growth factor has better stability and biological activity, and compared with a traditional extraction type nerve growth factor, the production cost is lower, large-scale production is more facilitated, and the method is suitable for industrial production. The invention has important application significance and application prospect in the field of preparation and application of therapeutic agents for pet neurotrophic keratitis and neurotrophic corneal ulcer.

Compositions and methods are provided for the treatment and degradation of biofilms. In some aspects, engineered polypeptides are provided that can both degrade extracellular polysaccharides (EPS) in biofilm matrix and breaks down quorum-sensing signal molecules that can contribute to formation of biofilms. The engineered polypeptides may synergize with antibiotics such as tobramycin to reduce biofilms. Uses of the engineered polypeptides to treat biofilm infections in medical and other settings are also provided.

The invention discloses a tobramycin polymyxin conjugated compound as well as a preparation method and application thereof. The tobramycin and polymyxin conjugated compound comprises tobramycin and polymyxin which are connected through a chemical bond, and specifically, the tobramycin and the polymyxin are connected through an amido bond or triazole. The tobramycin polymyxin conjugated compound disclosed by the invention can be used for efficiently killing persistent bacteria under the condition of independently using the tobramycin polymyxin conjugated compound; particularly, the modified tobramycin and polymyxin B are connected through an amido bond to obtain the compound AKPB1, high-retention-level mutant strains of escherichia coli can be efficiently killed under the condition of independent medication, the dosage is small, and the compound AKPB1 obviously has potential important application value in the aspect of clinical antibacterial infection treatment and has a broad application prospect. The compound is expected to be used for treating bacterial infection diseases including but not limited to pneumonia, blood flow infection, urinary tract infection, respiratory tract infection, intestinal infection and the like, and is expected to be used for treating bacterial infection of animals.

The application relates to the field of analysis and detection, and relates to preparation of a composite silver film coupled with surface plasmons and application of the composite silver film in SERS detection of tobramycin. The preparation of the composite silver film comprises preparation of two layers of silver films, one layer being a self-assembled silver nanoparticle film loaded on the front surface of PDMS, and the other layer being a silver cube film loaded on the back surface of the PDMS. The surface plasmons of the two layers of silver films are coupled with each other by controlling the thickness of the PDMS, and the two layers of silver films are used as a SERS substrate for analysis and detection, so that the sensitivity of detection can be greatly improved. The detection limit of tobramycin can be as low as 2.36*10 ‑12 M, and the linear detection range is 10 ‑5 ~10 ‑11 M, and the relative standard deviation of SERS intensity is less than 10%. The composite silver film prepared by the application has high sensitivity, good universality and practical prospect.

The embodiment of the present application provides a kind of nanofiltration membrane and its preparation method.The nanofiltration membrane provided by the embodiment of the present application includes base film, and the separation layer is arranged on the base film, and the separation layer includes the polymer formed based on tobramycin.Thus, tobramycin can provide a large number of amino groups and hydroxyl groups for nanofiltration membrane, electrostatic effect is generated by amino group, lithium ions and other ions are selectively separated, and other ions can be effectively intercepted, to improve the selectivity of nanofiltration membrane.Meanwhile, the amino groups and hydroxyl groups provided by tobramycin control the relatively loose separation layer formed by nanofiltration membrane, can improve the permeability of nanofiltration membrane, and effectively improve the processing efficiency of nanofiltration membrane.

The present invention relates to compositions, kits and methods using combinations of surfactants or cell wall-hydrolyzing enzymes with antibiotics to potentiate the antibiotic effect against bacterial infections. In some embodiments, the surfactant is a pore-forming biosurfactant such as rhamnolipids and the antibiotic is an aminoglycoside antibiotic such as tobramycin.