Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Stable camptothecine liposome composition

A technology of liposome composition and camptothecin, which is applied in the directions of drug combination, liposome delivery, anti-tumor drugs, etc., can solve the problems of lactone ring-opening reaction, toxic and side effects, and curative effect reduction.

Inactive Publication Date: 2008-10-15
NANJING CHANGAO PHARMA SCI & TECH CO LTD
View PDF4 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The technical problem to be solved by the present invention is that a kind of camptothecin drugs in clinical use is prone to lactone ring-opening reaction in the body, and the curative effect is reduced, resulting in the problem of toxic and side effects

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stable camptothecine liposome composition
  • Stable camptothecine liposome composition
  • Stable camptothecine liposome composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Soy Lecithin: 1g

[0040] Cholesterol 0.1g

[0041] Ascorbic Acid 50mg

[0042] Vitamin E 10mg

[0043] Irinotecan Hydrochloride 50mg

[0044] Trehalose 2.0g

[0045] Weigh 50 mg of irinotecan hydrochloride, 1.0 g of soybean lecithin, 0.1 g of cholesterol, 50 mg of ascorbic acid, and 10 mg of vitamin E and dissolve them in 100 ml of ethanol, place the solution in a round-bottomed flask, and use a rotary evaporator on a constant temperature water bath at 40°C Ethanol was evaporated under the condition of 50rpm and reduced pressure, so that membrane materials such as phospholipids formed a uniform lipid membrane at the bottom of the flask, placed in a vacuum desiccator, and placed at room temperature for 24 hours for later use. After taking it out, add 30ml of pH7.4 phosphate buffer solution, and then wash the membrane by rotating the above-mentioned round-bottom flask at 37°C with a rotary evaporator until the lipid membrane is hydrated and becomes a milky white lipo...

Embodiment 2

[0047] Hydrogenated phospholipids: 0.6g

[0048] Cholesterol 0.1g

[0049] Maleic acid 100mg

[0050] Vitamin E 15mg

[0051] 10-Hydroxycamptothecin 20mg

[0052] Glucose 1.5g

[0053] Dissolve 20mg of 10-hydroxycamptothecin and 100mg of maleic acid in 20ml of water for injection, and dissolve 0.6g of hydrogenated phospholipids, vitamin E and 0.1g of cholesterol in 100ml of ether, slowly inject the ether phase into the continuously stirring water phase, Water-bath ultrasonication until the emulsification is uniform, put it into a round-bottomed flask with a ground mouth, and evaporate the ether with a rotary evaporator on a 40°C constant temperature water bath at 100rpm and under reduced pressure. After the micelles are formed, add 30ml pH7. 4 Phosphate buffer solution, and then rotate the above-mentioned round-bottomed flask with a rotary evaporator at 37°C until the micelles are evenly dispersed in the hydration medium to obtain a milky white liposome suspension. 1.5 g ...

Embodiment 3

[0055] Lecithin: 1.2g

[0056] PEG-DSPE0.8g

[0057] Cholesterol 0.3g

[0058] Malic acid 50mg

[0059] Topotecan 50mg

[0060] Lactose 100mg

[0061] Sucrose 2.0g

[0062] Inject nitrogen into 10ml water for injection for 10min, add 5mg topotecan, 50mg malic acid, 0.8g PEG-DSPE, 1.2g lecithin and 0.3g cholesterol after nitrogen flushing, and use a high-speed stirrer to mix the mixture at 65°C Disperse for 10 minutes, then emulsify the pre-dispersion 3 times in a high-pressure homogenizer (7500psi, 65°C), cool the liposomes to room temperature, add 100mg lactose, 2.0g sucrose, dissolve in the liposome suspension, After aseptic filtration with a 0.22 μm microporous membrane, it is divided into vials, freeze-dried, and obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A stable liposome composition comprises camptothecin or derivatives thereof, phospholipid, cholesterol, organic acids and the buffer salts of the camptothecins, and pharmaceutically-acceptable excipient. The composition can specifically increase the stability of the camptothecins, improve the curative effect, and reduce the toxic and side effects of the camptothecins.

Description

technical field [0001] The invention belongs to the field of pharmaceutical preparations, and relates to a stable liposome composition, which contains camptothecin or its derivatives, phospholipids, cholesterol, organic acids, inorganic acids and their buffer salts and other pharmaceutically acceptable Excipients can specifically increase the stability of camptothecin drugs, thereby improving curative effect and reducing toxic and side effects. Background technique [0002] Camptothecin (CPT) is an anti-tumor compound extracted from Camptotheca japonica, which inhibits DNA synthesis of cancer cells by targeting DNA topoisomerase I (topoisomerase, topo-I). Anti-tumor effect, due to the disadvantages of poor water solubility, high toxicity and side effects, it is difficult to apply in the clinic, and the research on its structural modification has been going on, and the research in this area is very active. [0003] Camptothecin is composed of five rings A, B, C, D, and E in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A61K9/127A61K31/337A61P35/00
Inventor 张自强李战覃斌谢晓燕许玫
Owner NANJING CHANGAO PHARMA SCI & TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com