97 results about "Daunorubicin" patented technology

The invention discloses a dual target liposome and a preparation method and application thereof. The target liposome provided by the invention consists of liposome and modifiers on the surface of the liposome, wherein the modifiers on the surface of the liposome comprise p-aminophenyl-alpha-D-manno-pyranoside and transferrin. The invention also discloses a medicament-loaded liposome, which is obtained by wrapping daunorubicin by using the target liposome. The obtained target liposome has good capability of crossing the blood brain barrier, targets brain glioma, and can be used as a medicament carrier. The medicament-loaded liposome can target the medicament to a brain glioma site after crossing the blood brain barrier so as to greatly increase the concentration of the medicament at a tumor site and improve the effect of chemotherapy. The target liposome provides a new measure for brain glioma chemotherapy, contributes to the research of non-invasive therapy of the brain glioma, and has important theoretical meaning and clinical meaning.

The invention relates to a method for preparing a graphene oxide double-targeting medicine carrier material, and a medicine loaded by the carrier material. The method is used for preparing the carrier material and the loaded medicine. The invention solves the problems that the conventional nano-medicine carrier has a complicated structure, is high in synthetic cost and low in efficiency, and cannot be massively prepared easily. The method for preparing the graphene oxide double-targeting medicine carrier material comprises the following steps of: preparing carboxymethylated graphene oxide; preparing a graphene oxide-biologically targeting molecule composite; and preparing the graphene oxide double-targeting medicine carrier material, wherein the loaded medicine is one or more of doxorubicin hydrochloride, paclitaxel, hydroxycamptothecine and daunomycin.

A method of synthesizing 4-R-substituted anthracyclines and their corresponding salts from 4-demethyldaunorubicin includes the steps of treating 4-demethyldaunorubicin with a sulfonylating agent to form 4-demethyl-4-sulfonyl-R₃-daunorubicin. 4-Demethyl-4-R₃-sulfonyl-daunorubicin is then subject to a reducing agent in the presence of a transition metal catalyst in a temperature range of about 30° C. to about 100° C. in a polar aprotic solvent in an inert atmosphere. Protected 4-demethoxy-4-R-daunomycin then undergoes hydrolysis in a basic solution to form the 4-R-substituted anthracyclines. The novel method lacks the step of forming a stereospecific glycoside bond between aglycone and aminoglycoside. The method also increases the yield of the final product up to 30 to 40%.

The invention belongs to the field of medicine and gene engineering, and provides a composition for inhibiting the proliferation of tumor cells. The composition contains epigallocatechin gallate (EGCG) and daunorubicin (DNR), and the mass ratio of the epigallocatechin gallate to the daunorubicin is 600: 1-1: 2. The combination of the EGCG and the DNR, on one hand, ensures that the effect of inhibiting the proliferation of the tumor cells is more obvious than the superposition of single use effects, on the other hand, the combination of the EGCG and the DNR obviously reduces the using amount of the DNR, greatly reduces the cardiac toxicity of the DNR, and strengthens the anti-tumor effect of the DNR at the same time. The EGCG is a natural tea extract, has rich resource and low price, and almost has no toxic side effect after more than one thousand years of drinking, so the combination of the EGCG and the DNR relatively reduces the using amount of the DNR and drug cost. The invention provides a high-efficiency cheap anti-tumor pharmaceutical composition, which improves the inhibition rate of tumor and reduces the treatment cost of tumor patients at the same time.

The invention relates to a derivative of tetra cyclic anthroquinones antibiotics with anti-cancer activity, namely, the compound shown by formula (I). The derivative of the tetra cyclic anthroquinones antibiotics has the activity equal to or even higher than that of the known medicines such as doxorubicin, daunorubicin and the like at cell level and simultaneously has better tolerance than the doxorubicin on animal bodies.

A method of preparing the anthracyclin carminomycin using a starting material comprising daunorubicin. The method comprises reacting daunorubicin or N-protected daunorubicin with soft Lewis acids for the demethylation of the 4-methoxy group, resulting in a reaction mass. The reaction mass is treated with an aqueous solution of a strong organic acid or a mineral acid. After decomposition of the resulting carminomycin and Lewis acids reactive complex, the reaction mass is extracted using a water insoluble organic solvent. As a result, carminomycin is extracted as a base.

The invention discloses an antharcycline antitumor antibiotics loaded nano-micelle preparation, which comprises antharcycline antitumor antibiotics, A-B-C type triblock polymer and assisting agents, wherein the antharcycline antitumor antibiotics is one or more of adriamycin, daunorubicin, pharmorubicin, perarubicin or lacinomycin; and the A-B-C type triblock polymer is polyethylene glycol-polyethylene glycol containing carboxyl on side chain-polyester. According to the preparation, drugs are coated in the nano-micelle by virtue of the coaction of self-assembly of segmented copolymer and electrostatic adsorption, the nano-micelle has uniform and stable grain diameter, the encapsulation efficiency reaches 99 percent, and the prepared nano-micelle preparation is of a spherical structure with grain diameter between 20 and 300nm; and the shell of the micelle is made from polyethylene glycol molecules, so that drugs are prevented from being contacted with enzyme and other protein molecules in blood or identified and swallowed by a reticuloendothelial system in the body, so that the circulating period of micelle in the body can be prolonged.

Compositions which comprise an anthracycline agent, and a cytidine analog are encapsulated in liposomal carriers. The preferred anthracycline agent is selected from the group of daunorubicin, doxorubicin, and idarubicin, while the preferred cytidine analog is selected from the group of cytarabine, gemcitabine, or 5-azacytidine. The combination of the anthracycline agent and cytidine analog encapsulated in said liposomal carriers are useful in achieving a drug retention and a sustained drug release for each therapeutic agent.

Disclosed is a transformant prepared by introducing a ketoreductase gene involved in the biosynthesis of L-epivancosamine into an actinobacterium originally capable of producing daunorubicin. Also disclosed is a process of efficiently producing a non-natural daunorubicin derivative using the transformant. The transformant is capable of efficiently producing a non-natural daunorubicin derivative such as epidaunorubicin.

A method of synthesizing R1, R2-substituted-4′ (ax. or eq.)-OH anthracyclines and their corresponding salts of Formula (1) from daunorubicin or N-Trifluoroacetyl-4-R1-derivatives of daunorubicin, wherein R1 is defined as H, OH, and 4′-HO is defined as ax[ial]. The method includes producing N-Trifluoroacetyl daunorubicin and treating the N-Trifluoroacetyldaunorubicin or N-Trifluoroacetyl-4-R₁-derivatives of daunorubicin, wherein R₁ is defined as H, OH, with dimethylsulfoxide activated by different acylating agents. The attained intermediate product is then treated with a strong base (ex. tertiary amines) resulting in the 4′-keto-N-Trifluoroacetyl-4-R₁ daunorubicin wherein R₁ is defined as H, OH, OMe. The 4′-keto-N-Trifluoroacetyl-4-R₁-daunorubicin is reacted with a reducing agent, a derivative of a borohydride of an alkaline metal MHBL₃ , to produce N-Trifluoroacetyl-4′-epi-4-R₁-daunorubicin. The N-Trifluoroacetyl-4′-epi-4-R₁-daunorubicin undergoes hydrolysis in a basic solution to produce a derivate of an anthoacyclin which is halogenized [by complex halogenides] to form a 14-Hal-derivative. This result is then hydrolyzed by well-known methods in the presence of a formate of an alkaline metal to form the desired final compound.

The present invention relates to a method of treating patients with solid tumors, leukemias, and other malignancies using a combination of zosuquidar, daunorubicin, and cytarabine. The invention is also directed to pharmaceutical formulations comprising zosuquidar, daunorubicin, and cytarabine. The formulations are particularly effective in treating relapsed Acute Myelogenous Leukemia (AML).

This invention is in the field of chemical restructuring of pharmaceutical agents known to cause tissue toxicity as a side effect, by producing their orotate derivatives. More particularly, it concerns orotate derivatives of the anthracyclines, doxorubicin and daunorubicin, that are found to reduce levels of the pharmaceutical agent in noncancerous tissues. There orotate derivatives are equally efficacious in inhibiting the SCCAKI-1 kidney tumor in animals and the reduction in the heart tissue of doxorubicin compared with doxorubicin HCl suggests a reduction in toxicity induced by free radical generation by the anthrracyclines.

The method for synthesizing 4-R-substituted anthracycline antibiotics and corresponding salts thereof from 4-demethyldaunorubicin comprises the following steps: treating 4-demethyldaunorubicin with a sulfonating agent to form 4-demethyldaunorubicin Methyl-4-sulfonyl-R3-daunorubicin; then in an inert atmosphere, in an aprotic polar solvent, in the temperature range of about 30-100 ° C, in the presence of a transition metal catalyst to make 4- Demethyl-4-R3-sulfonyl-daunorubicin reacts with reducing agent. Then, the protected 4-desmethoxy-4-R-daunorubicin is hydrolyzed in alkaline solution to form 4-R-substituted anthracycline antibiotics. The new method eliminates the step of forming a stereospecific glycoside between the aglycone and the aminoglycoside. The method also increases the yield of the final product by up to 30 to 40%.

The invention provides a method for preparing high-purity 4'-epi-daunorubicin, which comprises the following steps of: a) loading the treated 4'-epi-daunorubicin fermentation liquor on macroporous weak acid resin, and eluting by using aqueous solution of acetone or methanol added with hydrochloric acid; b) evaporating the 4'-epi-daunorubicin eluent to dryness, dissolving in water, and extracting by using chloroform; and c) loading the 4'-epi-daunorubicin extracting solution on nonpolar adsorption resin, and eluting by using aqueous solution of acetone to obtain the 4'-epi-daunorubicin. The method has simple steps, is suitable for large-scale industrial production, and has high commercial value; and the final purity of the prepared 4'-epi-daunorubicin is improved to over 97 percent.

The present invention is degradable polymer supported nanometer Daunorubicin microsphere and its preparation process. The microsphere has size of 200-800 nm, Daunorubicin carrying rate of 3.05-18.4 %, encapsulating rate of 53.2-88.3 %, and degradable polymer polylactic acid or polylactic acid-polyglycolic acid copolymer. Experiment shows that the nanometer Daunorubicin microsphere may be released continuously in buffering phosphate solution for 2-8 weeks and the releasing rate and period may be controlled through changing the sort and molecular weight of the polymer. The nanometer Daunorubicin microsphere is superior to conventional Daunorubicin preparation, and has higher acute promyelocytic leukemia cell ingesting efficiency, higher tumor cell inhibiting rate and long effective period.

The invention discloses a magnetic targeted anti-tumor drug system for drug-resistant tumor cells and a construction method thereof. The drug system comprises a small interfering RNA-nucleic acid aptamer carrier, an anti-tumor drug immobilized by the carrier, and polyethylene imine-modified superparamagnetic iron tetraoxide nanoparticles. The expression of a corresponding protein is down-regulatedby using small interfering RNA, and the magnetic targeted anti-tumor drug system has high specificity and high efficiency; after the magnetic targeted anti-tumor drug system combines a single chemotherapeutic drug daunromycin with a nucleic acid aptamer, the biocompatibility of the drug is increased, and targeting is endowed, to provide a possibility to reduce the killing effect of chemotherapeutic drugs on normal cells; and at the same time, a photosensitizer porphyrin is loaded to achieve the dual tumor killing effect of chemotherapy and photodynamic therapy. PEI-modified superparamagneticferroferric oxide nanoparticles are used as anticancer drugs/gene carriers for synergistic enhancement of therapeutic efficiency, and as effective ultrasound contrast agents for in vitro tumor imaging.

This invention is to manufacture a kit for preparation of nano-targeted liposome drugs in combined chemotherapy and radionuclide therapy. It is a kit consisting of three components: (1) A 10 ml vial A which contains BMEDA, gluconate acetate, SnCl₂. (2) A 10 ml vial B which contains DSPC, cholesterol, DSPE-PEG, and Doxorubicin(DXR) (or Daunorubicin, Vinolbine). (3) A 10 ml vial C which contains ¹⁸⁸ReO₄⁻ (or ¹⁸⁶ReO₄⁻) solution. The procedure of using the kit is as follows: (1) Remove the contents of the ¹⁸⁸ReO₄⁻ (or ¹⁸⁶ReO₄⁻) solution from vial C. (2) Inject the ¹⁸⁸ReO₄⁻ (or ¹⁸⁶ReO₄⁻) solution into the vial A, and the mixtures react in appropriate temperature. (3) Remove the contents of the ¹⁸⁸Re-BMEDA (or ¹⁸⁶Re-BMEDA) solution from vial A. (4) Inject the ¹⁸⁸Re-BMEDA (or ¹⁸⁶Re-BMEDA) solution into the vial B, and the mixtures react in appropriate temperature. The reconstituted solution in the vial B is applied to combine bimodality radiochemotherapy for treatment of tumor and ascites.

The invention discloses a compound serving as an anti-tumor medicine synergist and a reversal agent and belongs to the technical field of medicines. The invention provides application of an avermectinmedicine to preparation of an anti-tumor medicine and application of the avermectin medicine to preparation of the anti-tumor medicine synergist or the reversal agent. The invention also provides ananti-tumor medicine composition which comprises one or more anti-tumor medicines and one or more avermectin medicines as effective components. The avermectin medicine is avermectin, ivermectin, epiomycin, doramectin or eprinomectin, and the anti-tumor medicine is vincristine and salt thereof, daunorubicin, taxol and salt thereof or doxorubicin. The avermectin medicine can improve the sensibility of tumors to chemotherapeutic medicines and thus can be used as the anti-tumor medicine synergist; and the avermectin medicine has an excellent effect on reversing the medicine resistance of tumor cells to the anti-tumor medicine.

Methods of treatment and pharmaceutical combinations are provided for the treatment of acute leukemia, such as acute myelogenous leukemia, and myelodysplastic syndrome. The methods of treatment and pharmaceutical combinations employ an anti-CD33 cytotoxic conjugate in combination with at least one compound selected from the group consisting of an anthracycline and a pyrimidine or purine nucleoside analog. Preferred methods of treatment and pharmaceutical combinations employ gemtuzumab ozogamicin, daunorubicin, and cytarabine.