31 results about "Nitrocamptothecin" patented technology

The present invention provides methods and formulations for optimizing the anti-cancer and anti-HIV activities of a camptothecin drug, including camptothecin and its related analogs including 9-aminocamptothecin and 9-nitrocamptothecin. The invention involves methodologies and formulations that limit human serum albumin-mediated reduction of the anti-cancer and anti-HIV effects of the camptothecins, and the methods and formulations provide combination therapies in which binding of the camptothecin agent to human serum albumin can be modulated by the administration of a competing agent such as ibuprofen, clofibrate or clofibric acid that also binds human serum albumin. Reduced camptothecin drug binding to human serum albumin can result in elevated camptothecin free drug levels and thus improve the effectiveness of treatment regimens involving these drugs. Further agents such as methotrexate and AZT can also be used in cancer and HIV-positive patients employing camptothecin drugs.

A polymorphic form of 9-nitrocamptothecin is provided, the polymorph being characterizable as having, by differential scanning calorimetry, an endotherm at between 175.5 and 177.5° C., an exotherm at between 181.7 and 183.7° C., and an IR spectrum with no absorption centered between 3625 cm-1 and 3675 cm-1.

Various 14-nitro, 14-amino, and 14-substituted amino camptothecin derivatives are useful in the treatment of cancer and other hyperproliferative diseases. 14-Nitro camptothecin derivatives are conveniently prepared by reacting a camptothecin derivative with fuming nitric acid, optionally employing acetic anhydride as a solvent.

The invention belongs to the field of medicine, and specifically relates to an anticancer drug composition. The anticancer drug composition contains arctigenin and camptothecine drugs. The camptothecine drugs of the present invention comprise camptothecine, hydroxy camptothecine or nitrocamptothecine. The present invention provides a microemulsion preparation containing the drug composition and an injection containing the drug composition. Compared to the single drug, the drug composition of the present invention provides a synergistic effect for inhibition of non-small cell lung cancer.

The invention relates to a preparation for increasing the active closed-loop rate of camptothecin compounds through simply adding polyethylene glycol. The liquid preparation is prepared from polyethylene glycol, camptothecin derivatives and a dispersion medium, wherein the polyethylene glycol is taken as an additive, the camptothecin derivatives are taken as medicament molecules, the dispersion medium is taken as a solvent, and the main body of the dispersion medium is water. The main additive is polyethylene glycol, and the medicament molecules are one or more of camptothecin, 10-hydroxycamptothecine, 9-nitrocamptothecin, 9-aminocamptothecin, 7-ethyl-10-hydroxycamptothecine, Topotecan, Irinotecan, Rubitecan, Exatecan, Belotecan, Karenitecin, Chimmitecan, Gimatecan, and the like. Through simply adding polyethylene glycol, the preparation can significantly improve the active closed-loop rate of camptothecin drugs, enhances the medicament effect, and can effectively reduce the general reaction of medicament, and therefore, the preparation is expected to be used in the cancer treatment of different stages.

The present invention relates to a compound 9-nitrocamptothecine solid dispersion and its preparation method. Said invention adopts 9-nitrocamptothecine as medicine active componnet, and adds carrier material, and separately adopts grinding method, freeze-drying method, melting method and solvent method to prepare the invented product which can be made into capsule, table and drip pill. It can raise solubility of medicine, as compared with raw material medicine its resolution speed can be raised by 4-80 times, it can promote absorption, can reduce irritation of medicine to stomach and intestine and can raise stability of the medicine.

A composite 9-nitrocamptothecin lipid nanoparticle used for preparing injection is prepared from 9-nitrocamptothecin, lipid and surfactant.

The invention discloses two novel crystal forms of 9-nitrocamptothecin and preparation methods thereof. In the X-ray powder diffraction pattern with copper target as a radiation source, the crystal form I has characteristic diffraction peaks at the diffraction angle 2theta of 5.8+ / -0.1 degrees, 7.4+ / -0.1 degrees, 8.8+ / -0.1 degrees, 10.5+ / -0.1 degrees, 11.3+ / -0.2 degrees, 11.7+ / -0 degrees, 15.7+ / -0.2 degrees, 17.8+ / -0.1 degrees, 18.7+ / -0.1 degrees, 21.1+ / -0.1 degrees, 24.1+ / -0.1 degrees and 26.2+ / -0.1 degrees and the crystal form II has the characteristic diffraction peaks at the diffraction angle 2theta is 6.1+ / -0.2 degrees, 6.7+ / -0.1 degrees, 7.5+ / -0.2 degrees, 9.4+ / -0.1 degrees, 11.4+ / -0.2 degrees, 12.4+ / -0.1 degrees, 14.1+ / -0.1 degrees, 15.1+ / -0.1 degrees, 17.6+ / -0.1 degrees, 19.7+ / -0.1 degrees, 22.6+ / -0.1 degrees, 23.8+ / -0.1 degrees, 25.2+ / -0.1 degrees, 27.3+ / -0.1 degrees and 29.2+ / -0.2 degrees. The preparation methods of the two novel crystal forms of 9-nitrocamptothecin are based on a supercritical anti-solvent process. The solubility of the prepared novel crystal forms I and II of 9-nitrocamptothecin is higher than that of the existing crystal forms of 9-nitrocamptothecin, and the thermal stability of the prepared novel crystal forms I and II of 9-nitrocamptothecin is more excellent than that of the existing crystal forms of 9-nitrocamptothecin.

A process for separating and purifying 9-nitro camptothecine includes such steps as nitrifying the camptothecine by concentrated sulfuric acid or nitric acid, adsorbing the acid liquid containing coarse product by macroreticular resin, desorbing to obtain coarse product, chromatography by silicon gel column, eluting by n-hexane, ethyl acetate, or their mixture, rotation evaporating to recover solvent, and vacuum drying. Its purity is 99.5-99.9%.

The invention provides a process for preparing 9-nitrocamptothecine which consists of the following steps, oxidizing camptothecine raw material to obtain N-oxidized camptothecine, nitrating the N-oxidized camptothecine, -dioxyhexacyclic inversing flow and concentrating to obtain 9-nitro camptothecine crude product, finally carrying out recrystallization to obtain the refined product, the final yield of the 9-nitrocamptothecine can reach over 50%, the product purity can reach over 97%.

The invention relates to a 9-nitrocamptothecin mixed micelle freeze-dried powder injection and a preparation method thereof. The preparation adopts 9-nitrocamptothecin as an effective component, and comprises phospholipid, bile salts, a freeze-drying protective agent, and other auxiliary materials. The ratio of 9-nitrocamptothecin, phospholipid, bile salts, the freeze-drying protective agent, and other auxiliary materials is 1:1-45:5-70:10-150:a proper amount. The freeze-dried powder injection prepared by the invention not only can effectively solve the problem of insolubility of 9-nitrocamptothecin in water, but also can significantly improve drug bioavailability. The preparation process of the invention is simple, and applicable to industrial production, and the product is good in stability, and good in curative effect.

The invention relates to a method for synthesizing 9-nitrocamptothecin. The method solves the technical problem that the 9-nitrocamptothecin cannot be industrially synthesized. The method comprises the following steps of: performing single nitro reduction on 2,6-dinitrobenzaldehyde serving as a raw material to obtain 2-amino-6-nitrobenzaldehyde glycol acetal, and performing condensation reaction on the2-amino-6-nitrobenzaldehyde glycol acetal and alpha-(S)-tricyclic amide to obtain the 9-nitrocamptothecin. The method has the advantages of mild reaction condition, simplicity and convenience inoperation, low cost, high product yield and good product purity, overcomes the defects of the prior art, and is suitable for industrialized batch synthesis production.

The invention provides a 9-nitrocamptothecin (NC)-cyclodextrin inclusion compound aiming at the technical problems of poor solubility and low bioavailability of 9-nitrocamptothecin in the prior art. The 9-NC-cyclodextrin inclusion compound comprises an active ingredient 9-NC of which the molecular mole ratio is 1:(30-200), an inclusion agent beta-CD or a derivant thereof. A concrete preparation method comprises the following steps: dropwise adding a 9-NC-acetone saturated solution to a CD solution; magnetically stirring at 25-60 DEG C until acetone completely volatilizes; taking supernate to carry out freeze drying after centrifuging the obtained suspension, so as to obtain 9-NC-CD inclusion compound powder. Meanwhile, the invention provides a pharmaceutical composition containing the 9-NC-CD inclusion compound and a pharmaceutically acceptable excipient. Compared with a 9-NC free drug, the solubility of the inclusion compound provided by the invention is increased by over 300 times; meanwhile, the inclusion compound displays higher lactone stability and in-vitro slow-release effect. An X-ray diffraction analysis method and a thermal analysis method indicate that 9-NC in the inclusion compound is completely included, and the reliability of the technology is further verified. Therefore, the inclusion compound can be developed into a liquid preparation, also can improve in vivo absorption of a 9-NC solid preparation, and the bioavailability is improved.

The invention provides an emulsion of camptothecin derivative which comprises the components by weight: 0.01 to 0.1 percent of 10-methyl-9 nitryl camptothecin, 5 to 20 percent of oil for injection, 1-4 percent of emulsifier, 1-4 percent of co-emulsifier, 0 to 60 percent of solubilizer, 2 to 3 percent of glycerin of isotonizing agent and Vitamin E and the rest is water for injection; the sum of the percentages of all components is 100 percent. The emulsifier and a co-surfactant are dissolved in the oil for injection, heated and added with the solubilizer and 10-methyl-9 nitryl camptothecin to be dissolved, ant then added with the glycerin of isotonizing agent and the water for injection and made into primary emulsion by means of high speed homogenization or ultrasound, then further made into the emulsion by means of high pressure homogenization or micro jet. The prepared emulsion of the invention has uniform particle diameter and high content of drug and the appearance of the emulsion is a milky white or blue opalescence homogeneous system; meanwhile, compared with other preparation methods, the micro jet technique is adopted by the invention to prepare the emulsion, so as to ensure less loss of drug and better stability of the emulsion. The emulsion of camptothecin derivative of the invention has reasonable design and easy operation, which is suitable for practical use.