RGD (Arginine-Glycine-Aspartic Acid) peptide modified double-layer medicine carrying nanometer particle and preparation method thereof
A nanoparticle, RGD sequence technology, applied in the field of biomedicine and nanomedicine, can solve the problems of inability to clinical treatment, difficult to solve the problem of non-selective distribution of drugs in the brain, limited drug amount, etc., to achieve high anti-tumor efficiency and prolong drug effect. Time, effect of reversing drug resistance
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[0037] Example 1
[0038] 1. Synthesize RGD-CS
[0039] Weigh 1μmol chitosan (CS), dissolve it in 5ml acetic acid, and call it solution A; weigh 16μmol RGD (CRGDKGPDC), dissolve it in 2.1ml sodium acetate buffer, and call it solution B. Weigh 16 μmol NHS-PEG-MAL and add it to solution A in solid form at room temperature. After vortexing for 30 seconds, add all the reaction solution to solution B, and continue to react at room temperature for 12 hours. Then transfer to an ultrafiltration tube with a molecular weight cut-off of 50kDa, perform ultrafiltration 5-6 times at 4000 rpm and 30 min to remove unreacted PEG-RGD and RGD, and collect the upper layer of liquid and freeze-dry to obtain a white loose solid.
[0040] Or: Weigh 1μmol chitosan (CS) with a molecular weight of 1μmol and dissolve it in 5ml acetic acid and call it solution A; Weigh 16μmol RGD (CRGDKGPDC) and dissolve it in 2.1ml sodium acetate buffer and call it solution B. Weigh 16 μmol of Sulfo-SMCC and add it to soluti...
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[0043] Example 2
[0044] The preparation method is the same as in Example 1, the CRGDKGPDC in the prescription is changed to CRGDKGPEC of the same number of moles, and the dosage of other components in the prescription is fixed to prepare CRGDKGPEC-modified nanoparticles.
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[0045] Example 3
[0046] With the preparation method of Example 1, the CRGDKGPDC in the prescription was changed to the same mole number of CRGDRGPEC, and the dosage of other components in the prescription was fixed to prepare CRGDRGPEC-modified nanoparticles.
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