It is injected intravenously lipid microbubble and preparation method thereof
Technical field
The invention belongs to pharmaceutical technology field, more particularly it relates to a kind of intravenous injection lipid microbubble and its system
Preparation Method.
Background technology
Microvesicle is exactly a kind of trickle bubble, and they are widely present in nature, seem it is ordinary but have it is unusual
Meaning, key are the gas being wherein wrapped in.Gas is a kind of very strong sound scattering body, and with extremely strong compressible
Property, the small iron ball of particle diameter identical are compared with bubble, and the scattering section of bubble is 1,000,000 times of small iron ball.Because ultrasonic wave is connect
The intensity Q of receipts is reflector scattering section S and incident intensity D direct proportion function, and scattering section S is microvesicle intrinsic frequency f
With Scatter radium R function (S=af4R6), when ultrasonic wave runs into gas, caused scattering can be stronger than solid thousands of times.
Microvesicle is artificially added in blood, and original material is entirely different in their acoustic impedance values and blood, ultrasonic wave
Strong scattering will be produced when them are run into, so as to be presented as the enhancing of echo on ultrasonogram, therefore, microvesicle is one
The preferable acoustic contrast agent of kind.
Lipid microbubble is then that one layer of lipid film has been wrapped up on the surface of microvesicle, can not only reduce interfacial tension, is extended micro-
Residence time, and the kernel formed in vivo is steeped, can not only wrap up gas, or medicament-carried good platform,
Especially protide or fat-soluble medicine.Microvesicle occurs as a kind of highly effective cavitation nucleus, easy induced ultrasonic cavitation,
Cavitation occurs that acoustic horn effect can be produced in vivo, causes adjacent cells quilt " ultrasound punching ", causes permeability of cell membrane
Increase, beneficial to insoluble drug release.Therefore, microvesicle is expected in tumour, thrombolysis, inflammation treatment, and improve ventricular function, reduce it is postoperative
Played a role in adverse reaction etc..
For being injected intravenously lipid microbubble, suitable particle diameter is primary.From the point of view of drug safety, microvesicle
Particle diameter if it exceeds 10 μm, after intravenous injection, microvesicle can block capillary and cause local tissue necrosis, even cause
Hemiplegia or death.There are some researches show microvesicle particle diameter is related to its development effect in vivo, diameter is less than 0.5 μm of microvesicle pair
Echo is without obvious contribution.In general, average grain diameter is most suitable in 1.1~3.3 μm of lipid microbubble.It can be seen that average grain
Footpath and particle diameter distribution are to reflect the key index of lipid microbubble quality.
It is vital, system for the average grain diameter and particle diameter distribution of control lipid microbubble to select suitable preparation technology
Standby lipid microbubble mainly has two steps, and first is that homogeneous intermediate is made in the other compositions in prescription by addition to gas
Solution, the step generally use two-phase dripping method, magnetic agitation prepares uniform solution and the aqueous solution containing phosphatide respectively, then passes through
Two-phase is added dropwise to obtain midbody solution, because the phase transition temperature of phosphatide is higher, therefore, it is necessary to higher than 80 DEG C during magnetic agitation
Under the conditions of, phosphatide could be dissolved completely in propane diols, for phosphatide, ester bond is contained in its structure, be easily oxidized,
Harmful substance is generated, and the amount of actual participation formation adipose membrane can be reduced, and cause microvesicle stability to decline;Second is injection gas
Body, activated by certain way, prepare microvesicle, including ultrasonic cavitation, high speed shear, vibration, microfluid and ink-jet marking method etc..
In conventional research, more activation methods for paying close attention to microvesicle.
The content of the invention
Based on this, the defects of in order to overcome above-mentioned prior art, the invention provides a kind of lipid microbubble that is injected intravenously
New preparation method.
In order to realize foregoing invention purpose, this invention takes following technical scheme:
A kind of preparation method for being injected intravenously lipid microbubble, comprises the following steps:
(1), rotated by vacuum, the uniform solution containing matrix material is prepared;
(2), in the above-mentioned uniform solution containing matrix material, 9 times of volumes of addition contain tackifier, isotonic regulator
With the aqueous solution of pH adjusting agent, ultrasound or 4 DEG C stand overnight well mixed, obtain midbody solution;
(3) free gas, is injected in above-mentioned midbody solution, by mechanism, is produced.
In wherein some embodiments, ultrasonic frequency described in step (2) is 25KHz, and the time is 4-6 minutes.
In wherein some embodiments, vacuum described in step (1) revolving temperature be 45-55 DEG C, speed be 400~
500r/min, time 1h-1.5h;It is under conditions of vacuumizing, and the actual transformation temperature of phosphatide is less than theoretical value, so as to
Revolving dissolving phosphatide can be carried out at a lower temperature, avoid phosphatide from being dissolved under high-heat environment, the ester bond in protection structure
It is not hydrolyzed with ehter bond, the generation of blocking oxide reaction, so as to improve the stability of preparation.
In wherein some embodiments, matrix material described in step (1) is egg yolk lecithin, soybean lecithin, hydrogenation
Egg yolk lecithin, hydrogenated soy phosphatidyl choline, phosphatidyl choline, DPPC, phosphatidyl-ethanolamine, two palmityls
One or more in phosphatidyl-ethanolamine, phosphatidic acid, DPPA.
In wherein some embodiments, uniform solution solvent for use described in step (1) is propane diols, ethylene glycol or poly-
Ethylene glycol 300.
In wherein some embodiments, tackifier described in step (2) are glycerine, chitosan, hyaluronic acid or hyalomitome
Sour sodium.
In wherein some embodiments, isotonic regulator described in step (2) is glucose or sodium chloride.
In wherein some embodiments, pH adjusting agent described in step (2) is organic acid, organic base, inorganic acid, inorganic
Alkali or buffering pair.
In wherein some embodiments, free gas described in step (3) is air, nitrogen, sulfur fluoride or fluorocarbon gas
Body.
In wherein some embodiments, mechanism described in step (3) is high speed shear, ultrasonic cavitation or vibration.
In wherein some embodiments, the rotating speed of the high speed shear is 10000-11000rpm/min, time 1-
2min;The frequency of the ultrasonic cavitation is 40KHz-45KHz, time 3-5min;The frequency of the vibration is 4000-
5000rpm/min, time 45-50s.
Present invention also offers the intravenous injection lipid microbubble that above-mentioned preparation method is prepared.
Compared with prior art, the invention has the advantages that:
The preparation technology that the present invention proposes midbody solution be influence microvesicle average grain diameter and particle diameter distribution it is crucial because
Element, midbody solution is prepared using film ultrasound or film aquation method first, both midbody solution preparation methods can be
Phosphatide is completely dissolved less than under conditions of phosphatide phase transition temperature, avoids phosphatide from being dissolved under high-heat environment, in protection structure
Ester bond and ehter bond are not hydrolyzed, the generation of blocking oxide reaction, and so as to improve the stability of preparation, it is micro- to improve intravenous injection lipid
The drug safety and validity of bubble, and it is simple to operate, power consumption it is low, convenient for production, be easy to promote, be that one kind can be used for surpassing
The preparation method of the intravenous injection lipid microbubble of sound radiography and/or pharmaceutical carrier.
Brief description of the drawings
Fig. 1 is C made from Film-ultrasonic technique in the embodiment of the present invention 13F8It is injected intravenously the grain size distribution of lipid microbubble;
Fig. 2 is SF made from Film-ultrasonic technique in the embodiment of the present invention 16It is injected intravenously the grain size distribution of lipid microbubble;
Fig. 3 is film-C made from aquation method in the embodiment of the present invention 33F8It is injected intravenously the grain size distribution of lipid microbubble.
Fig. 4 is film-SF made from aquation method in the embodiment of the present invention 46It is injected intravenously the grain size distribution of lipid microbubble;
Embodiment
The present invention is further discussed below with specific embodiment below in conjunction with the accompanying drawings, the present invention does not address part and is applied to existing skill
Art.It is given below the specific embodiment of the present invention, but embodiment is merely to be described in further detail this explanation, is not intended to limit
The claim of invention.Reagent or raw material used in following examples, unless otherwise specified, derive from commercially available.
The present invention is rotated by vacuum and prepares the uniform solution containing matrix material, is added containing tackifier, isotonic regulation
Agent and the aqueous solution of pH adjusting agent, ultrasound or 4 DEG C stand overnight well mixed, obtain midbody solution, it is filling after injection freely
Gas, the methods of through high speed shear, ultrasonic cavitation or vibration, it can must be injected intravenously lipid microbubble.
Specific method is:
Using film ultrasound, vacuumize revolving to prepare the uniform solution containing matrix material, add containing tackifier, etc.
Conditioning agent and the aqueous solution of pH adjusting agent are oozed, ultrasonic mixing is uniform, obtains midbody solution, injects free gas, passes through at a high speed
The methods of shearing, ultrasonic cavitation or vibration, so as to form lipid microbubble.
Or:Using film aquation method, revolving is vacuumized to prepare the uniform solution containing matrix material, is added containing thickening
The aqueous solution of agent, isotonic regulator and pH adjusting agent, 4 DEG C stand overnight, abundant aquation, obtain midbody solution, injection is freely
Gas, the methods of by high speed shear, ultrasonic cavitation or vibration, so as to form lipid microbubble.
The Film-ultrasonic technique of embodiment 1 prepares C3F8It is injected intravenously lipid microbubble
The Film-ultrasonic technique of the present embodiment prepares C3F8Lipid microbubble is injected intravenously, is comprised the following steps:
(1), vacuumized under 50 DEG C, 400r/min revolving 1 hour with prepare DPPC containing 11mg,
The uniform solution 2.5ml of 7.8mg DPPEs and 1.2mg DPPAs;Prepare uniform solution institute
The solvent used is propane diols;
(2), add and contain 3.15g glycerine, 0.12g sodium chloride, 0.05g sodium dihydrogen phosphates and 0.05g disodium hydrogen phosphates
The aqueous solution, ultrasonic 5min are well mixed, and obtain midbody solution 25ml;
(3) 1.5mL midbody solutions, are taken into 2mL cillin bottles, inject C3F8Gas, it is placed in shaker, in 4550r/
45s is vibrated under min, produces intravenous injection lipid microbubble.
The particle diameter that lipid microbubble is injected intravenously made from the present embodiment is measured, as a result such as Fig. 1, from Fig. 1 results
Understand, the average grain diameter of the obtained intravenous injection lipid microbubble of the present embodiment is 2.237 μm, and particle diameter distribution is more concentrated, and is not deposited
It is less than the lipid microbubble that 0.5 μm and particle diameter be more than 10 μm in particle diameter, meets the security and effectively of intravenous injection lipid microbubble
Property require.
The Film-ultrasonic technique of embodiment 2 prepares SF6It is injected intravenously lipid microbubble
The Film-ultrasonic technique of the present embodiment prepares SF6Lipid microbubble is injected intravenously, is comprised the following steps:
(1) it is big to prepare egg yolk lecithin containing 10mg and 10mg revolving, to be vacuumized under 55 DEG C, 500r/min 1.5 hours
The uniform solution 2.5ml of beans lecithin;Solvent used in preparing uniform solution is propane diols;
(2) water containing 3.15g hyaluronic acids, 0.12g glucose, 0.04g arginine and 0.06g aspartic acids, is added
Solution, ultrasonic 5min are well mixed, and obtain midbody solution 25ml;
(3) 1.5mL midbody solutions, are taken into 2mL cillin bottles, inject SF6Gas, it is placed in shaker, in 4750r/
50s is vibrated under min, produces intravenous injection lipid microbubble.
The particle diameter that lipid microbubble is injected intravenously made from the present embodiment is measured, as a result such as Fig. 2, from Fig. 2 results
Understand, the average grain diameter of the obtained intravenous injection lipid microbubble of the present embodiment is 2.570 μm, and particle diameter distribution is more concentrated, and is not deposited
It is less than the lipid microbubble that 0.5 μm and particle diameter be more than 10 μm in particle diameter, meets the security and effectively of intravenous injection lipid microbubble
Property require.
3 films of embodiment-aquation method prepares C3F8It is injected intravenously lipid microbubble
(1), vacuumized under 50 DEG C, 400r/min revolving 1 hour with prepare DPPC containing 11mg,
The uniform solution 2.5ml of 7.8mg DPPEs and 1.2mg DPPAs;Prepare uniform solution institute
The solvent used is propane diols;
(2), add and contain 3.15g glycerine, 0.12g sodium chloride, 0.05g sodium dihydrogen phosphates and 0.05g disodium hydrogen phosphates
The aqueous solution, 4 DEG C stand overnight, and abundant aquation, obtain midbody solution 25ml;
(3) 1.5mL midbody solutions, are taken into 2mL cillin bottles, inject C3F8Gas, it is placed in shaker, in 4550r/
45s is vibrated under min, produces intravenous injection lipid microbubble.
The particle diameter that lipid microbubble is injected intravenously made from the present embodiment is measured, as a result such as Fig. 3, from Fig. 3 results
Understand, the average grain diameter of the obtained intravenous injection lipid microbubble of the present embodiment is 2.799 μm, and particle diameter distribution is more concentrated, and is not deposited
It is less than the lipid microbubble that 0.5 μm and particle diameter be more than 10 μm in particle diameter, meets the security and effectively of intravenous injection lipid microbubble
Property require.
4 films of embodiment-aquation method prepares SF6It is injected intravenously lipid microbubble
(1) it is big to prepare egg yolk lecithin containing 10mg and 10mg revolving, to be vacuumized under 55 DEG C, 500r/min 1.5 hours
The uniform solution 2.5ml of beans lecithin;Solvent used in preparing uniform solution is propane diols;
(2) water containing 3.15g hyaluronic acids, 0.12g glucose, 0.04g arginine and 0.06g aspartic acids, is added
Solution, 4 DEG C stand overnight, and abundant aquation, obtain midbody solution 25ml;
(3) 1.5mL midbody solutions, are taken into 2mL cillin bottles, inject SF6Gas, it is placed in shaker, in 4750r/
50s is vibrated under min, produces intravenous injection lipid microbubble.
The particle diameter that lipid microbubble is injected intravenously made from the present embodiment is measured, as a result such as Fig. 4, from Fig. 4 results
Understand, the average grain diameter of the obtained intravenous injection lipid microbubble of the present embodiment is 2.820 μm, and particle diameter distribution is more concentrated, and is not deposited
It is less than the lipid microbubble that 0.5 μm and particle diameter be more than 10 μm in particle diameter, meets the security and effectively of intravenous injection lipid microbubble
Property require.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.