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A kind of verapamil thermosensitive sustained-release preparation and its preparation method and application

A slow-release preparation and temperature-sensitive gel technology, which is applied in the field of medicine, can solve problems such as interference with normal physiological functions, and achieve the effects of alleviating the washing effect, obvious slow-release effect, and high encapsulation rate

Active Publication Date: 2022-03-01
北京丰帆生物医药科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although verapamil may enter clinical trials as a chemosensitizer, there are still many problems to be solved: (1) verapamil itself was first used as an L-type calcium channel (L-type calcium channels, LTCs) Antagonists are widely used in clinical diagnosis and treatment, and can be used to treat arrhythmia and pain. For example, as an anti-tumor adjuvant drug, Verapamil will be distributed systemically regardless of oral or intravenous infusion, and it will affect the cardiovascular, nervous and muscular systems. (2) MDR-1 also has its own important physiological functions and is the basis of active material transport (ATP-dependent material transport)

Method used

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  • A kind of verapamil thermosensitive sustained-release preparation and its preparation method and application
  • A kind of verapamil thermosensitive sustained-release preparation and its preparation method and application
  • A kind of verapamil thermosensitive sustained-release preparation and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Preparation of drug-loaded albumin nanoparticles-multilamellar liposomes-thermosensitive adhesive three-phase sustained release system

[0036] Research Methods and Experimental Means

[0037] (1) Preparation process of drug-loaded albumin nanoparticles-multilamellar liposomes-thermosensitive adhesive three-phase sustained release system

[0038] ①Preparation of drug-loaded denatured albumin: adding an appropriate amount of sodium dodecyl sulfate (SDS) to an aqueous solution of human serum albumin with a volume to mass ratio of 5%, boiling for 10 minutes to allow protein denaturation to complete, and then adding an aqueous solution of verapamil (Concentration is 10mg / mL, add 0.1-2mL), incubate at 100rpm, 37℃ for 6h, make the drug adsorbed on the hydrophobic domain of the protein, and form drug-loaded denatured albumin, the unadsorbed free drug is removed by dialysis ;

[0039] ②Formation of drug-loaded albumin nanoparticles-multilamellar liposome composite ...

Embodiment 2

[0043] Example 2: Establishment of HCC mouse liver orthotopic model and rat liver orthotopic tumor model

[0044] Research Methods and Experimental Means

[0045] ①Cultivate HCC cell lines HepG2 and MHCC-97H, etc., inoculate the cultured HCC cell lines subcutaneously in immunodeficiency mice, and after 3-4 weeks of growth, form a subcutaneous tumor model of HCC in immunodeficiency mice;

[0046] ② HCC cells were first inoculated subcutaneously in immunodeficient mice to form solid tumors, and small tissue masses with rich blood vessels on the surface of the solid tumors and in good condition were selected, and then inoculated into the livers of immunodeficient mice. After 4-6 weeks of growth, cancer nests with clear outlines can be formed in the liver of immunodeficient mice, which is the orthotopic HCC model (cancer nests) in the liver of immunodeficient mice;

[0047] ③Cultivate rat liver cancer cells Walker-256 cells, inoculate the cultured HCC cell line into SD rats subcu...

Embodiment 3

[0051] Example 3: Detection of metabolic properties of verapamil temperature-sensitive sustained-release preparations

[0052] Research Methods and Experimental Means

[0053] ①Establish and configure verapamil aqueous solution (use DMSO and other organic solvents to dissolve verapamil first, and then dilute with normal saline), verapamil solubilization solution (DMSO or solubilized solution of verapamil) , Blank nano-sustained-release preparation as a control;

[0054] ②Using the subcutaneous tumor model of immunodeficiency mice established above, solvent control, verapamil solubilization solution (solubilization preparation), and verapamil temperature-sensitive sustained-release preparation were injected into the subcutaneous tumor respectively. time to collect tumor specimens;

[0055] ③Using the SD rat subcutaneous tumor model established above, the verapamil aqueous solution was injected through the tail vein, or the solvent control, verapamil solubilization solution (s...

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Abstract

The invention provides a temperature-sensitive sustained-release preparation of verapamil, comprising: drug-loaded denatured albumin, multilamellar liposome (SUV) and thermosensitive glue; wherein the drug-loaded denatured albumin includes denatured albumin and an effective amount of verapamil. The present invention also provides a preparation method and application of the above-mentioned verapamil temperature-sensitive sustained-release preparation. The above preparation adopts denaturation of human serum albumin and incubates with verapamil to absorb verapamil to form drug nanoparticles, encapsulates albumin-verapamil drug nanoparticles with small unilamellar liposomes, and finally mixes with thermosensitive preparation Loxamer 127 is mixed to form a three-phase sustained-release system of drug-loaded albumin nanoparticles-multilamellar liposomes-thermosensitive adhesive.

Description

technical field [0001] The invention belongs to the technical field of medicine, and in particular relates to a temperature-sensitive sustained-release preparation of verapamil and its preparation method and application. Background technique [0002] Hepatocellular Carcinoma (HCC) is the most important pathological type of liver tumors. Most HCC patients are diagnosed at the advanced stage when they are first diagnosed, and they lose the chance of radical treatment such as liver transplantation or surgery. The median survival time is Only 3-6 months. HCC is characterized by multidrug resistance (Multi-Drug Resistance, MDR) to cytotoxic antitumor drugs, which makes HCC patients insensitive to cytotoxic chemotherapy drugs. At present, Sorafenib, the only first-line treatment drug for patients with advanced HCC, is an oral molecular targeted drug (i.e. multi-target small molecule protein kinase inhibitor): ① On the one hand, it can block vascular endothelial growth factor Vas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K9/52A61K47/42A61K47/10A61K47/20A61K31/277A61P35/00A61P35/02
CPCA61K9/5169A61K9/5123A61K9/5146A61K31/277A61P35/00A61P35/02
Inventor 冯帆王涛王正帅梁尔光
Owner 北京丰帆生物医药科技有限公司
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