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Preparation method of nanocomposite with molecular targeting/gene/photothermal therapy

A nanocomposite, molecular targeted drug technology, applied in gene therapy, medical preparations with non-active ingredients, and medical preparations containing active ingredients, etc., can solve the problems of complexity, inability to meet clinical needs, tumor recurrence, etc. , to inhibit proliferation, achieve high-efficiency treatment, and improve the effect of treatment

Inactive Publication Date: 2020-11-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The occurrence of cancer is the result of the joint action of many factors. The complexity of its biology makes monotherapy often fail to meet clinical needs, and the one-dimensional mechanism of action of single drug often activates or strengthens alternative pathways, promotes chemotherapy resistance, and even leading to tumor recurrence

Method used

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  • Preparation method of nanocomposite with molecular targeting/gene/photothermal therapy
  • Preparation method of nanocomposite with molecular targeting/gene/photothermal therapy
  • Preparation method of nanocomposite with molecular targeting/gene/photothermal therapy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 20 mg of N-4-azido-phthalimido-chitosan CS-N 3 Add to 2 mL dimethyl sulfoxide, stir until completely dissolved, then add 4 mg Er, 16 mg Q-amine, and 4 mg Cy7 to the flask. The above system was placed in a nitrogen atmosphere, and 200 μL of copper sulfate pentahydrate aqueous solution (20 mg / mL) and 200 μL of vitamin C sodium aqueous solution (15 mg / mL) were sequentially added dropwise to the flask with a 1 mL syringe. Cover the flask with foil and stir at room temperature for three days. The reaction solution was taken out and put into a dialysis bag (8000~14000 Da) for dialysis for three days. The dialysate was removed and lyophilized to obtain CE7Q. with ddH 2 O Make CE7Q and CQ into 460 μg / mL and 200 μg / mL solutions, respectively, then pipette 50 μL of each into a centrifuge tube, mix well to obtain CE7Q / CQ solution, and pipette with a pipette in a vortex state 100 μL of SV (80 μg / mL) solution was slowly added dropwise to the CE7Q / CQ solution and incubated at roo...

Embodiment 2

[0049] with ddH 2 o Make CE7Q and CQ in Example 1 into solutions of 100 μg / mL and 200 μg / mL, respectively, then draw 50 μL of each into a centrifuge tube, and mix well to obtain CE7Q / CQ solution. Pipette 100 μL of SV (10 μg / mL) solution into the CE7Q / CQ solution slowly dropwise, and incubate at room temperature for half an hour to obtain the nanocomposite CE7Q / CQ / S.

Embodiment 3

[0051] with ddH 2 O The CE7Q and CQ in Example 1 were prepared into solutions of 1000 μg / mL and 200 μg / mL, respectively, and then 50 μL of each was drawn into a centrifuge tube, and the CE7Q / CQ solution was obtained after mixing evenly. Pipette 100 μL of SV (300 μg / mL) solution slowly dropwise into CE7Q / CQ solution, and incubate at room temperature for half an hour to obtain nanocomposite CE7Q / CQ / S.

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Abstract

The invention belongs to the field of biological medicine and relates to a preparation method of a nano composite with a molecular targeting / gene / photo-thermal treatment function. The nano composite is CE7Q / CQ / S obtained in the mode that chitosan derivatives CE7Q and CQ are mixed and then carry expression plasmids SV of Survivin shRNA. According to the method, through erlotinib connected to the chitosan derivative CE7Q, the EGFR mutant lung cancer is specifically identified; through a fluorescent molecule Cy7 connected to the chitosan derivative CE7Q, near infrared fluorescence imaging and photo-thermal treatment are conducted; the chitosan derivatives CQ and CE7Q modified through quaternary ammonium salt are mixed, then carry a gene drug SV and lower Survivin expression, in cooperation with molecular targeting / gene / photo-thermal treatment, the EGFR mutant lung cancer is efficiently treated, and the drug resistance of EGFR-TKIs is reversed.

Description

technical field [0001] The invention belongs to the field of biomedicine, and in particular relates to a preparation method of a nanocomposite with molecular targeting / gene / photothermal therapy. Background technique [0002] The occurrence of cancer is the result of a combination of factors, and the complexity of its biology results in that single-agent therapy often fails to meet clinical needs, and the one-dimensional mechanism of action of a single agent often activates or strengthens alternative pathways, promoting chemotherapy resistance, and even lead to tumor recurrence. Epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) have a superior therapeutic effect in the initial treatment of EGFR-mutant non-small cell lung cancer (NSCLC), and then after a period of treatment with EGFR-TKIs, many patients Resistance will occur (Huang L , Fu L . Mechanisms of resistance to EGFRtyrosine kinase inhibitors[J]. Acta Pharmaceutica Sinica B, 2015, 5(5):S221138351...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K41/00A61K31/517A61K48/00A61K47/61A61K49/00A61P11/00A61P35/00
CPCA61K31/517A61K41/0052A61K47/61A61K48/0008A61K48/005A61K49/0034A61K49/0054A61P11/00A61P35/00A61K2300/00
Inventor 高瑜李子颖朱立胜李旭东张露徐靓陈海军
Owner FUZHOU UNIV