CN107137377A - A kind of tumor stem cell targeting lipids nanoparticle and preparation method and application - Google Patents
A kind of tumor stem cell targeting lipids nanoparticle and preparation method and application Download PDFInfo
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- CN107137377A CN107137377A CN201710198933.XA CN201710198933A CN107137377A CN 107137377 A CN107137377 A CN 107137377A CN 201710198933 A CN201710198933 A CN 201710198933A CN 107137377 A CN107137377 A CN 107137377A
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Abstract
The present invention provides a kind of tumor stem cell targeting lipids nanoparticle, it is made up of A15 polyethylene glycol octadecyl alcolols grafting, glycerin monostearate, salinomycin, the polyethylene glycol of the hydrophilic end carboxyl containing Amino End Group links octadecyl alcolol by esterification, the long fatty segment of octadecyl alcolol can be inserted into lipid nano particle, wherein A15 is RNA aptamers, it is strong with CD133 molecules affinity, the hepatic carcinoma stem cell of CD133 height expression can be targetted.The lipid nano particle encapsulates tumor stem cell specific drug salinomycin as carrier, by A15 targeting, is delivered to tumor stem cell and plays antineoplastic effect, targets and treat the hepatic carcinoma stem cell of CD133 molecules height expression.
Description
Technical field
The invention belongs to targeting lipids nanoparticle and preparation method, a kind of tumor stem cell targeting lipids nanoparticle is related generally to
And preparation method thereof.
Technical background
Solid lipid nano granule (Solid lipid nanoparticle, SLN) was developed in early 1990s
The new colloidal delivery system of a kind of alternative emulsion, liposome and the polymer nanoparticle that come, belongs to submicron delivery system.
SLN is easily prepared and available for intravenously administrable, it can also be used to oral or topical administration, is adapted to a variety of methods of administration.SLN is used as medicine
Carrier can improve the bioavilability of medicine, can control insoluble drug release and play good targeting.
Aptamer (Aptamer) is short DNA or RNA fragments, is typically made up of 12~30 bases.Aptamers can
The steric configuration of specific structure is formed, is specifically bound with target protein.Compared with antibody, aptamers possess molecular weight
Small, low immunogenicity, the advantages of easily obtain.A15 is RNA aptamers, can recognize that tumor stem cell mark CD133 molecules, and
Have compared with strong affinity and specificity.A15 is made up of 15 ribonucleotides, document report, compared with monoclonal antibody, the adaptation
Body penetrating power in tumour cell ball is strong, retention time is long.
Salinomycin is a kind of polyethers ionic antibiotic, has stronger to most of gram-positive bacterias and various coccidias
Suppression and killing action.Its preclinical and clinical data is less, a small number of document reports its there is serious muscle and god
Through toxicity, limit it and be mainly used in poultry disease.Gupta in 2009 et al. passes through high flux screening method, finds salinomycin tool
There is the ability of killing breast carcinoma stem cell, the effect for reducing breast carcinoma stem cell ratio is higher than conventional chemotherapy medicine taxol 100 times.
In other tumours, such as chronic lymphocytic leukemia, also having been demonstrated can specific killing tumor stem cell.
The content of the invention
It is an object of the present invention to provide a kind of lipid nano particle of tumor stem cell targeting, the nanoparticle is gathered by A15-
Ethylene glycol-octadecyl alcolol grafting, glycerin monostearate, monostearate macrogol ester, salinomycin composition, the poly- second of wherein A15-
The percentage by weight of glycol-octadecyl alcolol grafting is that 9.1~17.9wt%, the percentage by weight of glycerin monostearate are 69.5
~72.0wt%, the percentage by weight of monostearate macrogol ester is 3.6~7.6wt%, and the percentage by weight of salinomycin is
3.6~7.6wt%.
Second object of the present invention is to provide the preparation method of the tumor stem cell targeting lipids nanoparticle, specific logical
Cross following steps realization:
(1) 20mg glycerin monostearates, 1.0~2.0mg monostearates macrogol ester and 1.0~2.0mg are taken respectively
Amino End Group polyethylene glycol-octadecyl alcolol grafting, 1.0~2.0mg salinomycins are placed in 2.0mL absolute ethyl alcohols, and 50 DEG C of heating of water-bath are molten
Solution, is organic phase, and under the conditions of ultra-pure water is dispersed phase, magnetic agitation, organic phase injection dispersed phase continues to stir 5min, must contained
Lipid nano particle (the NH of free amine group2-PEG-SLN/SAL);
(2) free amine group lipid nano particle (NH is taken2- PEG-SLN/SAL) dispersion liquid, pyrocarbonic acid diethyl ester processing water dilution
Nanoparticle concentration is to 100 μ g/mL.The N of 1~2 times of amino mole of addition, the succinimidyl carbonates of N- bis- (DSC), room temperature is stirred
Mix (400rpm) reaction 9h.The amino A15 of equimolar number is added, continues stirring reaction and stays overnight.After reaction terminates, reaction solution is put
In the ultra-filtration centrifuge tube that molecular weight is 30kDa.Centrifugation, abandons filtrate, adds the cleaning of pyrocarbonic acid diethyl ester processing water twice, removes not
The aptamers of reaction.Non- filtered solution is A15-PEG3400- SLN/SAL nano dispersion fluids.
Third object of the present invention is to provide the synthetic method of Amino End Group polyethylene glycol-octadecyl alcolol grafting, by with
Lower step is realized:Polyethylene glycol (the NH containing Amino End Group end carboxyl is taken respectively2-PEG3400- COOH), be dissolved in anhydrous methylene chloride
Concentration 10mg/mL solution is made into, the octadecyl alcolol (ODC) with mole is added.According to mol ratio octadecyl alcolol:Dicyclohexyl carbon two
Imines:N-hydroxysuccinimide 1:1:1~1.5 ratio adds dicyclohexylcarbodiimide and n-hydroxysuccinimide,
24h is reacted at room temperature, after reaction terminates, reaction solution is added dropwise to the cold absolute ether of 8~10 times of volumes, 4 DEG C overnight, analyse product
Go out, precipitation is collected by centrifugation, abandon supernatant, collect precipitation, 40 DEG C of drying obtain Amino End Group polyethylene glycol-octadecyl alcolol grafting (NH2-
PEG3400-ODC)。
The lipid nano particle that fourth object of the present invention is to provide described tumor stem cell targeting is preparing administration system
Application in system.The tumor stem cell is the liver-cancer stem cell of CD133 molecules height expression.Contained medicine is that tumor stem cell is special
Specific agent salinomycin.
The A15 aptamers that the present invention chooses, the surface molecular label CD133 molecules with hepatic carcinoma stem cell, have
Stronger affinity, can pass through the specific binding with CD133 molecules, liver cancer targeting tumor stem cell.Hydrophilic contains Amino End Group
The polyethylene glycol of end carboxyl links octadecyl alcolol by esterification, and the long fatty segment of octadecyl alcolol can be inserted into lipid nano particle.Should
The Amino End Group of polyethylene glycol is free in lipid nano particle periphery, and N, the succinimidos of N- bis- are passed through with the amino of A15 aptamers
Carbonic ester is connected chemically, and realizes that A15 aptamers modify lipid nano particle.Liver-cancer stem cell targeting lipids nanoparticle is used as carrier bag
Tumor stem cell specific drug salinomycin is sealed, tumor stem cell is delivered to by A15 targeting, and improve salinomycin
The characteristics of slightly water-soluble and in vivo distribution difference, strengthen salinomycin drug effect.
Brief description of the drawings
Fig. 1 is infrared point of octadecyl alcolol, Amino End Group end carboxyl polyethylene glycol and Amino End Group polyethylene glycol-octadecyl alcolol grafting
Analyse collection of illustrative plates.
Fig. 2 is that tumor spheres absorb the cell percentages of the nanoparticle and absorb the flow cytometer showed figure of fluorescence intensity,
Blank control is not to be incubated nanoparticle group cell.
Embodiment
The present invention is further described in conjunction with the accompanying drawings and embodiments.
First, Amino End Group polyethylene glycol-octadecyl alcolol grafting (NH2-PEG3400- ODC) prepare
Embodiment 1:
Take 200mg NH2-PEG3400- COOH, 15.6mg octadecyl alcolols (ODC), are dissolved in 20mL anhydrous methylene chlorides, 11.9mg
Add dicyclohexylcarbodiimide 6.6mgN- HOSu NHSs, room temperature magnetic agitation (300rpm) reaction 24h.Reaction knot
Shu Hou, by the cold absolute ethers of the 200mL being added dropwise in reaction solution.4 DEG C overnight, make product fully separate out.Under the conditions of 4 DEG C
3000rpm centrifuges 5min, collects precipitation, and drying obtains Amino End Group polyethylene glycol-octadecyl alcolol grafting (NH2-PEG3400-ODC)。
Embodiment 2:
Take 200mg NH2-PEG3400- COOH, 7.8mg octadecyl alcolols (ODC), are dissolved in 20mL anhydrous methylene chlorides, add
11.9mg dicyclohexylcarbodiimide 10mg n-hydroxysuccinimides, room temperature magnetic agitation (300rpm) reaction 24h.Reaction
After end, by the cold absolute ethers of the 200mL being added dropwise in reaction solution.4 DEG C overnight, make product fully separate out.Under the conditions of 4 DEG C
3000rpm centrifuges 5min, collects precipitation, and drying obtains Amino End Group polyethylene glycol-octadecyl alcolol grafting (NH2-PEG3400-ODC)。
Embodiment 3:
Take 200mg NH2-PEG3400- COOH, 7.8mg octadecyl alcolols (ODC), are dissolved in 20mL anhydrous methylene chlorides, add
11.9mg dicyclohexylcarbodiimide 7.9mg n-hydroxysuccinimides, room temperature magnetic agitation (300rpm) reaction 24h.Instead
After should terminating, by the cold absolute ethers of the 160mL being added dropwise in reaction solution.4 DEG C overnight, make product fully separate out.Under the conditions of 4 DEG C
3000rpm centrifuges 5min, collects precipitation, and drying obtains Amino End Group polyethylene glycol-octadecyl alcolol grafting (NH2-PEG3400-ODC)。
Fourier transform infrared spectroscopy confirms grafting structure, such as accompanying drawing 1.At product infrared spectrogram, 720ppm positions
There is the deformation vibration peak for continuous four methylene (- (CH2) 4-) for belonging to octadecyl alcolol, and the hydroxyl (- OH) at 3350ppm
Stretching vibration peak disappears, and 1650ppm absworption peaks are attributed to the new stretching vibration peak for forming ester bond (C=O).
2nd, free amine group lipid nano particle (NH2- PEG-SLN/SAL) prepare
Embodiment 1
Take 20mg glycerin monostearates, 1.0mg salinomycins (SAL), 2mg monostearates macrogol ester and 2mg NH2-
PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL ultra-pure waters
For dispersed phase, under mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated nacl aqueous solution
0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter and surface potential be respectively
Embodiment 2
Take 20mg glycerin monostearates, 1.5mg salinomycins (SAL), 2.0mg monostearates macrogol ester and 2mg
NH2-PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL is ultrapure
Water is that under dispersed phase, mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated sodium-chloride is molten
Liquid 0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter 90.2nm and surface potential is -9.5mV.
Embodiment 3
Take 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 2.0mg monostearates macrogol ester and 2.0mg
NH2-PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL is ultrapure
Water is that under dispersed phase, mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated sodium-chloride is molten
Liquid 0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter 93.2nm and surface potential is -10.2mV.
Embodiment 4
Take 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 2.0mg monostearates macrogol ester and 1.5mg
NH2-PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL is ultrapure
Water is that under dispersed phase, mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated sodium-chloride is molten
Liquid 0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter is 92.5nm and surface potential is -10.7mV.
Embodiment 5
Take 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 2.0mg monostearates macrogol ester and 1.0mg
NH2-PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL is ultrapure
Water is that under dispersed phase, mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated sodium-chloride is molten
Liquid 0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter 94.5nm and surface potential is -11.0mV.
Embodiment 6
Take 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 1.5mg monostearates macrogol ester and 2.0mg
NH2-PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL is ultrapure
Water is that under dispersed phase, mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated sodium-chloride is molten
Liquid 0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter 96.8nm and surface potential is -10.2mV.
Embodiment 7
Take 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 1.0mg monostearates macrogol ester and 2.0mg
NH2-PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL is ultrapure
Water is that under dispersed phase, mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated sodium-chloride is molten
Liquid 0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter 98.0nm and surface potential is -10.7mV.
Embodiment 8
Take 20mg glycerin monostearates, 1.0mg salinomycins (SAL), 1.0mg monostearates macrogol ester and 2.0mg
NH2-PEG3400- ODC graftings, it is accurately weighed, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of dissolvings of water-bath, are organic phase.20mL is ultrapure
Water is that under dispersed phase, mechanical agitation (400rpm), organic phase is rapidly injected dispersed phase, stirs 5min.Saturated sodium-chloride is molten
Liquid 0.5mL adjusts ionic strength, and flocculate nanoparticle, obtains (the NH of lipid nano particle containing free amine group2-PEG-SLN/SAL).After measured
NH2- PEG-SLN/SAL particle diameter 85.4nm and surface potential is -10.1mV.
3rd, prepared by liver-cancer stem cell targeting lipids nanoparticle
Embodiment 1
Take by 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 2.0mg monostearates macrogol ester and
2.0mg NH2-PEG3400Free amine group lipid nano particle (NH prepared by-ODC graftings2- PEG-SLN/SAL) 200 μ of dispersion liquid
L.Pyrocarbonic acid diethyl ester processing water dilutes nanoparticle concentration to 100 μ g/mL.Add 14 μ L 1.0mg/mL N, the succinyls of N- bis-
Iminocarbonates (DSC) aqueous solution.Reaction 9h is stirred at room temperature.Add 54.9 μ L 1mM Amino End Group aptamers A15-NH2, after
Continuous stirring reaction is stayed overnight.After reaction terminates, the ultra-filtration centrifuge tube that molecular weight is 30kDa is placed reaction liquid into.Under the conditions of 4 DEG C
20000rpm centrifuges 10min, abandons filtrate, adds the processing water cleaning of 0.5mL pyrocarbonic acid diethyl esters, repeats the step twice, remove
Unreacted aptamers.Non- filtered solution is A15-PEG3400- SLN/SAL nanosuspensions.The particle diameter of nanoparticle after measured
For 126nm, current potential is -14.6mV.
Embodiment 2
Take by 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 2.0mg monostearates macrogol ester and
2.0mg NH2-PEG3400Free amine group lipid nano particle (NH prepared by-ODC graftings2- PEG-SLN/SAL) 200 μ of dispersion liquid
L.Pyrocarbonic acid diethyl ester processing water dilutes nanoparticle concentration to 100 μ g/mL.Add 21 μ L 1.0mg/mL N, the succinyls of N- bis-
Iminocarbonates (DSC) aqueous solution.Reaction 9h is stirred at room temperature.Add 54.9 μ L 1mM Amino End Group aptamers A15-NH2, after
Continuous stirring reaction is stayed overnight.After reaction terminates, the ultra-filtration centrifuge tube that molecular weight is 30kDa is placed reaction liquid into.Under the conditions of 4 DEG C
20000rpm centrifuges 10min, abandons filtrate, adds the processing water cleaning of 0.5mL pyrocarbonic acid diethyl esters, repeats the step twice, remove
Unreacted aptamers.Non- filtered solution is A15-PEG3400- SLN/SAL nanosuspensions.The particle diameter of nanoparticle after measured
For 106nm, current potential is -16.2mV.
Embodiment 3
Take by 20mg glycerin monostearates, 2.0mg salinomycins (SAL), 2.0mg monostearates macrogol ester and
2.0mg NH2-PEG3400Free amine group lipid nano particle (NH prepared by-ODC graftings2- PEG-SLN/SAL) 200 μ of dispersion liquid
L.Pyrocarbonic acid diethyl ester processing water dilutes nanoparticle concentration to 100 μ g/mL.Add 28 μ L 1.0mg/mL N, the succinyls of N- bis-
Iminocarbonates (DSC) aqueous solution.Reaction 9h is stirred at room temperature.Add 54.9 μ L 1mM Amino End Group aptamers A15-NH2, after
Continuous stirring reaction is stayed overnight.After reaction terminates, the ultra-filtration centrifuge tube that molecular weight is 30kDa is placed reaction liquid into.Under the conditions of 4 DEG C
20000rpm centrifuges 10min, abandons filtrate, adds the processing water cleaning of 0.5mL pyrocarbonic acid diethyl esters, repeats the step twice, remove
Unreacted aptamers.Non- filtered solution is A15-PEG3400- SLN/SAL nanosuspensions.The particle diameter of nanoparticle after measured
For 106nm, current potential is -14.4mV.
Connect after A15 aptamers, A15-PEG3400- SLN/SAL particle diameter is slightly increase;Amino End Group disappears, nanoparticle
Current potential declines.
4th, the tumor spheres intake of tumor stem cell targeting lipids nanoparticle
Embodiment 1:
Take 20mg glycerin monostearates, 2mg monostearate macrogol esters, 2mg salinomycins and 2mg NH2-PEG3400-
ODC, it is accurately weighed;100 μ g stearylamine-fluorescein isothiocynate is separately taken, 2.0mL absolute ethyl alcohols are placed in, 50 DEG C of water-bath is dissolved,
For organic phase.20mL ultra-pure waters are organic phase injection dispersed phase under dispersed phase, mechanical agitation (400rpm), stir 5min.
Saturated nacl aqueous solution adjusts the ionic strength of dispersion liquid, and flocculate nanoparticle, prepares the free amine group lipid nanometer of fluorescence labeling
Grain
Take the fluorescence labeling NH of preparation2- PEG-SLN nanoparticles, pyrocarbonic acid diethyl ester processing water dilution nanoparticle concentration is extremely
100μg/mL.21 μ L 1.0mg/mL N, the succinimidyl carbonates of N- bis- (DSC) solution.Reaction 9h is stirred at room temperature.Add
54.9 μ L 1mM Amino End Group aptamers A15-NH2, continue stirring reaction and stay overnight.After reaction terminates, molecule is placed reaction liquid into
Measure the ultra-filtration centrifuge tube for 30kDa.20000rpm centrifuges 10min under the conditions of 4 DEG C, abandons filtrate, adds appropriate pyrocarbonic acid diethyl ester
Water cleaning is handled, the step is repeated twice, unreacted aptamers are removed.Non- filtered solution is the A15-PEG- of fluorescence labeling
SLN/SAL nanosuspensions.
Immunological magnetic bead sorting method is taken to sort to obtain CD133+Hepatic carcinoma stem cell, and carry out serum free suspension ball culture,
When cell ball growth in thickness is to about 200 μm, the A15-PEG-SLN/SAL nanosuspensions of fluorescence labeling are added, are incubated different
Time (0.5h, 2h, 6h, 12h).
Referring to accompanying drawing 2, flow cytomery intake positive cell ratio and cell fluorescence intensity, 7.5% during 0.5h
Cell is detectable higher than the fluorescent value for not being incubated cellular control unit, and 94.9% cell has green florescent signal during 6h, almost
All cells of cell ball have intake.Incubation time continues to extend, and fluorescence intensity is moved to right, and cellular uptake amount is on the increase.A15
The liver-cancer stem cell targeting lipids nanoparticle intake of modification lipid nano particle formation is delivered to tumor stem cell.
5th, application of the tumor stem cell targeting lipids nanoparticle as pharmaceutical carrier in antineoplastic is prepared
Embodiment 1
Using Acid Phosphatase Test method method, free salinomycin and liver-cancer stem cell targeting lipids nanoparticle A15- are determined
PEG-SLN/SAL tumor stem cell antiproliferative activity.Take and sort to obtain CD133+ tumor stem cells, serum free suspension ball culture,
When cell ball growth in thickness is to about 200 μm, A15-PEG-SLN/SAL nanoparticles and salinomycin dimethyl sulfoxide solution are added.37
Under the conditions of DEG C 48h is incubated with cell ball.Determine the absorbance at 405nm and calculate cell survival rate.
The tumor stem cell IC of the hepatic carcinoma stem cell target lipid grain of rice50It is worth for 0.69 ± 0.015 μ g/mL.Salinomycin
Group cell survival rate declines with the increase of concentration, when concentration is 0.8 μ g/mL, when survival rate is down to 55%, continues increase salt mould
Plain concentration, because being limited by salinomycin dissolubility, medicine is separated out, and cell survival rate changes unobvious.Result of study shows that liver cancer swells
Knurl stem cell target lipid nano particle, can improve the dissolubility of salinomycin, and salinomycin drug effect can be strengthened as pharmaceutical carrier.
Claims (6)
1. a kind of tumor stem cell targeting lipids nanoparticle, it is characterised in that by A15- polyethylene glycol-octadecyl alcolol grafting, single
Tristerin is constituted, and the percentage by weight of wherein A15- polyethylene glycol-octadecyl alcolol grafting is 9.1~17.9wt%, list
The percentage by weight of tristerin is 69.5~72.0wt%, and the percentage by weight of monostearate macrogol ester is 3.6
~7.6wt%, the percentage by weight of salinomycin is 3.6~7.6wt%.
2. a kind of preparation method of tumor stem cell targeting lipids nanoparticle described in claim 1, it is characterised in that by with
Lower step is realized:
(1) polyethylene glycol containing Amino End Group and end carboxyl, the octadecyl alcolol with mole are taken respectively, are dissolved in anhydrous methylene chloride.
According to mol ratio octadecyl alcolol:Dicyclohexylcarbodiimide:N-hydroxysuccinimide 1:1:1~1.5 ratio adds two hexamethylenes
Base carbodiimide and n-hydroxysuccinimide, after room temperature reaction, reaction solution are added dropwise to the cold anhydrous second of 8~10 times of volumes
Ether, 4 DEG C overnight, separate out product, precipitation are collected by centrifugation, dry to obtain free terminal amino group polyethylene glycol-octadecyl alcolol grafting;
(2) 20mg glycerin monostearates, 1.0~2.0mg monostearates macrogol ester and 1.0~2.0mg ends ammonia are taken respectively
Base polyethylene glycol-octadecyl alcolol grafting, 1.0~2.0mg salinomycins are placed in 2.0mL absolute ethyl alcohols, and 50 DEG C of heating for dissolving of water-bath are
Organic phase, under the conditions of ultra-pure water is dispersed phase, magnetic agitation, organic phase injection dispersed phase continues to stir 5min, obtained containing free ammonia
The lipid nano particle of base;
(3) take the lipid nano particle of free amine group, add the N of 1~2 times of amino molal quantity, the succinimidyl carbonates of N- bis-,
9h is reacted at room temperature, the Amino End Group aptamers A15 of amino molal quantity such as adds, reaction stays overnight, and after reaction terminates, places reaction liquid into
Molecular weight is 30kDa ultra-filtration centrifuge tube, and high speed centrifugation abandons filtrate, plus the cleaning of pyrocarbonic acid diethyl ester processing water is twice, removes not
The A15 of reaction, non-filtered solution is hepatic carcinoma stem cell target lipid nano particle dispersion liquid.
3. a kind of tumor stem cell targeting lipids nanoparticle according to claim 1, it is characterised in that Amino End Group therein
Step realization is synthesized by the following way in polyethylene glycol-octadecyl alcolol grafting:Take the polyethylene glycol containing Amino End Group end carboxyl, be dissolved in nothing
Water dichloromethane is made into concentration 10mg/mL solution, the octadecyl alcolol with mole is added, according to mol ratio octadecyl alcolol:Two hexamethylenes
Base carbodiimide:N-hydroxysuccinimide 1:1:1~1.5 ratio adds dicyclohexylcarbodiimide and N- hydroxysuccinimidyl acyls
Imines, reacts at room temperature 24h, after reaction terminates, and reaction solution is added dropwise to the cold absolute ether of 8~10 times of volumes, and 4 DEG C overnight, make
Product is separated out, and precipitation is collected by centrifugation, and abandons supernatant, collects precipitation, and 40 DEG C of drying obtain Amino End Group polyethylene glycol-octadecyl alcolol grafting
Thing.
4. tumor stem cell targeting lipids nanoparticle according to claim 1 is preparing antineoplastic as drug-loading system
In application.
5. application according to claim 4, it is characterised in that the tumor stem cell is the liver of CD133 molecules height expression
Cancer stem cell.
6. application according to claim 4, it is characterised in that contained medicine is salinomycin.
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CN108866061A (en) * | 2018-06-21 | 2018-11-23 | 中山大学附属第五医院 | A kind of aptamer identifying liver cancer cells and its screening technique and purposes |
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CN116426532A (en) * | 2023-06-08 | 2023-07-14 | 时夕(广州)生物科技有限公司 | Targeting aptamer and application thereof |
CN116426532B (en) * | 2023-06-08 | 2023-09-12 | 时夕(广州)生物科技有限公司 | Targeting aptamer and application thereof |
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