Beisalutin sustained-release implantation agent for curing entity tumour

A slow-release implant and tumor technology, applied in the field of medicine, can solve problems such as systemic toxicity and side effects that limit clinical applications

Inactive Publication Date: 2009-12-02
SHANDONG LANJIN PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although alone or in combination with other anticancer drugs may have a certain effect on some tumors, the systemic side effects caused by conventional administration limit its clinical application

Method used

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  • Beisalutin sustained-release implantation agent for curing entity tumour
  • Beisalutin sustained-release implantation agent for curing entity tumour

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Put the weighed (60mg) sustained-release excipient (polylactic acid (PLA) with a molecular weight of 10000-20000) into the container, add a certain amount of organic solvent to dissolve and mix (subject to complete dissolution), then add 40mg of Sarotin, re-shake well and vacuum-dry to remove organic solvents. The dried solid composition is shaped immediately, subpackaged and sterilized by radiation to obtain a slow-release implant containing 40% bexarotene. The release time of the sustained-release implant in physiological saline in vitro is 20-26 days, and the release time in mouse subcutaneous is 24-28 days.

Embodiment 2

[0086] Sustained-release implants were made according to the method described in Example 1, but the anti-cancer active ingredients contained were one of the following:

[0087] (A) 1% bexarotene and 99% polylactic acid;

[0088] (B) 5% bexarotene and 95% polylactic acid;

[0089] (C) 10% bexarotene and 90% polylactic acid;

[0090] (D) 15% bexarotene and 85% polylactic acid;

[0091] (E) 20% bexarotene and 80% polylactic acid.

Embodiment 3

[0093]Put the weighed (75mg) sustained-release excipient (PLGA with a molecular weight of 15000-25000, 50:50) into the container, add a certain amount of organic solvent to dissolve and mix (subject to full dissolution), then add 25mg of Besa Rodin, shake again and dry in vacuo to remove organic solvents. The dried solid composition is shaped immediately, subpackaged and sterilized by radiation to obtain a slow-release implant containing 25% bexarotene. The release time of the slow-release implant in physiological saline in vitro is 18-24 days, and the release time in mouse subcutaneous is 16-24 days.

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Abstract

A bexarotene slow-release implant for treating solid tumors is characterized in that the slow-release implant contains an effective anticancer dose of bexarotene, a slow-release auxiliary material and a certain amount of slow-release regulator. Solid tumors include lung cancer, esophageal cancer, gastric cancer, liver cancer, breast cancer, ovarian cancer, prostate cancer, bladder cancer, and colorectal cancer. Sustained-release excipients are mainly copolymers of glycolic acid and glycolic acid, polyphenylpropanol, poly(L-lactide-co-ethyl phosphate), and poly(L-lactide-co-propyl phosphate). One or a combination thereof can slowly release bexarotene locally in the tumor during its degradation and absorption, so while significantly reducing its systemic toxicity, it can also maintain an effective drug concentration in the local tumor. Local placement of the anti-sustained-release implant in the tumor can not only reduce the systemic toxicity of bexarotene, but also selectively increase the drug concentration in the local tumor, and enhance the therapeutic effect of non-surgical treatments such as chemotherapy drugs and radiotherapy.

Description

(1) Technical field [0001] The invention relates to a bexarotene sustained-release implant for treating solid tumors, belonging to the technical field of medicines. (2) Background technology [0002] Although the research on cancer has made great progress, its mortality rate is still in the forefront of various common causes of death. The latest data show that in 2006, 3 million people died of cancer in my country. The incidence of cancer is increasing year by year and tends to be younger. Statistics show that in less than 20 years, the incidence of cancer in my country has increased by 69%, and the mortality rate has increased by 29.4%. According to the latest statistics from the World Health Organization, the global cancer incidence rate will increase by 50% by 2020, and the number of patients will increase to 15 million. It is estimated that 4 million people will die of cancer every year in my country in 2020. Therefore, exploring an effective method or drug for treatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K31/192A61K47/34A61K9/00A61P35/00
Inventor 孙娟马玲君
Owner SHANDONG LANJIN PHARMA
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