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

A ROS-responsive nano-drug delivery system and its preparation method and application

A delivery system and nano-drug technology, which is applied in the field of nano-drug delivery system and its preparation, can solve the problems of drug release that are rarely studied, and achieve the effects of good stability, good biocompatibility, and uniform particle size

Active Publication Date: 2018-12-25
SHANGHAI JIAOTONG UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as pH-sensitive, reduction-sensitive, temperature-sensitive, enzyme-sensitive and light-sensitive, etc., but the drug release in response to reactive oxygen species (ROS) is rarely studied

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
  • A ROS-responsive nano-drug delivery system and its preparation method and application
  • A ROS-responsive nano-drug delivery system and its preparation method and application
  • A ROS-responsive nano-drug delivery system and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. The synthesis steps of up-conversion material UCNPs are as follows:

[0055] 4mmol CF 3 COONa and 2mmol (total amount) Ln(CF 3 COO) 3 (Ln: 78mol%Y+20mol%Yb+1.6mol%Er+0.4mol%Tm) was added to a 100mL three-necked bottle, and 20mL oleylamine was added. Stir and heat to 120°C to remove moisture and oxygen, and stir for 1 h with nitrogen gas. During this period, the state of nitrogen gas has been kept, and when the reaction solution turns transparent, the temperature is raised to 320°C, and the temperature rises by 10°C per minute. After rising to 320°C, the reaction was stirred for 1 hour, and the reaction ended. When the temperature dropped to room temperature, excess oleylamine was washed away with hexane oxide and chloroform, and vacuum-dried.

[0056] 2. The steps of synthesizing ROS-sensitive thioketal linker (TL) are as follows:

[0057] Anhydrous 3-mercaptopropionic acid (5.2g, 49.1mmol) and anhydrous acetone (5.8g, 98.2mmol) were saturated with dry HCl gas ...

Embodiment 2

[0064] 1. The synthesis steps of the up-conversion material UCNPs are the same as in Example 1, and will not be repeated here

[0065] 2. The steps of the ROS-sensitive thioketal linker (TL) are the same as those in Example 1, and will not be repeated here.

[0066] 3. The experimental steps of synthesizing TL-DOX are as follows:

[0067] TL (252.1mg, 1.0mmol) was dissolved in anhydrous 10mL DMF, followed by adding triethylamine (TEA, 303.6mg, 3.0mmol), 2,4,6-trichlorobenzoyl chloride (241.9mg, 1.0mmol) , dimethylaminopyridine (DMAP, 24.4 mg, 0.2 mmol), stirred for 10 min. Doxorubicin (DOX, 271.76mg, 0.5mmol) dissolved in 10mL of DMF was added, and the reaction was stirred at room temperature for 24h. The reaction was quenched with water, and the crude product was passed through a silica gel column to obtain pure product.

[0068] 4. The process of assembling Ce6-DOX-UCNPs is as follows:

[0069] Add TL-DOX (0.06mmol), mPEG-COOH (0.15mmol) and UCNPs (10mg) to 3mL DMF, add ...

Embodiment 3

[0071] 1. The synthesis steps of UCNPs, an up-conversion material, are the same as those in Example 1, and will not be repeated here.

[0072] 2. The steps of the ROS-sensitive thioketal linker (TL) are the same as those in Example 1, and will not be repeated here.

[0073] 3. The experimental steps for synthesizing TL-CPT are the same as those in Example 1, and will not be repeated here.

[0074] 4. The process of assembling PheA-CPT-UCNPs is as follows:

[0075] TL-CPT (0.06mmol), PheA (0.06mmol), mPEG-COOH (0.15mmol) and UCNPs (10mg) were added to 3mL DMF, ultrasonicated at 150W for 15min, stirred at room temperature for 1h and centrifuged three times (11250g, 10min / time) to collect the solid Substances were washed with HEPES buffer solution and resuspended.

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a ROS (reactive oxygen species)-response nano drug delivery system which comprises UCNPs (upconversion nanophosphors), carboxylated PEG (polyethylene glycol) connected with UCNPs, a photosensitizer, a ROS-sensitive thioketal linker and an anti-tumor chemotherapeutic drug connected with the thioketal linker, wherein the photosensitizer contains carboxyl, and the excitation spectrum of the photosensitizer is superposed with the upconversion emission spectrum of UCNPs. The invention also discloses a preparation method and application of the ROS-response nano drug delivery system. The ROS-response nano drug delivery system disclosed by the invention can control the drug release temporally and spatially and can perform combination therapy of photodynamics therapy and chemotherapy to eradicate tumor once; and meanwhile, the fluorescence emitted by UCNPs or the light emitted by the photosensitizer can perform fluorescence imaging, and thus, therapy-imaging integration can be realized.

Description

technical field [0001] The invention relates to the field of pharmaceutical preparations, in particular to a ROS-responsive nano drug delivery system and its preparation method and application. Background technique [0002] Chemotherapy is a common treatment method after tumor diagnosis, but chemotherapy is often accompanied by many side effects. In order to obtain the best therapeutic effect and avoid side effects, many nanomaterials are used to load slow-release chemotherapy drugs. These drugs are usually tumor-targetable and the drug release is controlled. Such as pH-sensitive, reduction-sensitive, temperature-sensitive, enzyme-sensitive and light-sensitive, etc., but the drug release in response to reactive oxygen species (ROS) is rarely studied. Light-controlled ROS stimulation has the advantage of being able to precisely control the time and location of release. [0003] The ROS pressure of tumor cells is higher than that of normal cells, partly due to the stimulatio...

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 Patents(China)
IPC IPC(8): A61K41/00A61K47/54A61K49/00A61P35/00A61K31/4745A61K31/704
CPCA61K31/4745A61K31/704A61K41/0071A61K49/0019A61K49/0036A61K49/0054A61K2300/00
Inventor 崔大祥岳彩霞
Owner SHANGHAI JIAOTONG UNIV
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