WO2021114160A1 - 一种微囊泡的生产方法、基于该微囊泡的生产方法得到的微囊泡及其应用 - Google Patents
一种微囊泡的生产方法、基于该微囊泡的生产方法得到的微囊泡及其应用 Download PDFInfo
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- WO2021114160A1 WO2021114160A1 PCT/CN2019/124763 CN2019124763W WO2021114160A1 WO 2021114160 A1 WO2021114160 A1 WO 2021114160A1 CN 2019124763 W CN2019124763 W CN 2019124763W WO 2021114160 A1 WO2021114160 A1 WO 2021114160A1
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- A—HUMAN NECESSITIES
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- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/30—Nerves; Brain; Eyes; Corneal cells; Cerebrospinal fluid; Neuronal stem cells; Neuronal precursor cells; Glial cells; Oligodendrocytes; Schwann cells; Astroglia; Astrocytes; Choroid plexus; Spinal cord tissue
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- C12N13/00—Treatment of microorganisms or enzymes with electrical or wave energy, e.g. magnetism, sonic waves
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- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
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- the present invention relates to the field of biomedicine technology, in particular to a method for producing microvesicles, microvesicles obtained based on the above-mentioned microvesicle production methods, and applications thereof.
- Exosomes a kind of small lipid microvesicles, with a size of 50-150nm, play a vital role in physiology and pathology.
- exosomes mediate cell-to-cell communication by transferring proteins and genetic information between cells.
- Cell-derived exosomes/microvesicles can not only avoid immune rejection, but are also convenient to store, which has great application value in regenerative medicine.
- exosomes/microvesicles The current method of collecting exosomes/microvesicles is by culturing cells, collecting a large amount of cell supernatant, separating and extracting, which is expensive.
- the output of exosomes severely limits its application in the field of biomedicine.
- the low yield of exosomes/microvesicles severely limits its application and further clinical promotion. How to non-invasively promote the production of exosomes/microvesicles has important scientific research and application value.
- shock wave therapy is used to promote the secretion of exosomes
- the literature is published in Cardiovascular research.
- shock wave therapy is used to stimulate endothelial cells, and the resulting exosomes carry miR-19a-3p, which can improve part of the function of myocardial ischemia.
- microvesicles that are non-damaging to cells and suitable for a variety of cells, microvesicles obtained based on the above-mentioned microvesicle production methods, and applications thereof.
- a method for producing microvesicles includes the following steps:
- the following steps are further included before sonicating the cells:
- the cells When the concentration of the cells is greater than or equal to 70%, the cells are placed on a serum-free medium.
- the ultrasonic energy interval is 0.2W/cm2-4W/cm2, and the ultrasonic treatment time is 1s-10min.
- the ultrasonic device used in ultrasonic processing includes a signal generator, a power amplifier, and an ultrasonic probe
- the power amplifier is connected to the signal generator
- the ultrasonic probe is connected to the power amplifier
- the ultrasonic probe It is a focused probe or a non-focused probe or an array probe, and the frequency is 200KHz-5MHz.
- the step of purifying the cell supernatant to obtain the microvesicles is:
- microvesicle extraction reagent is then added to perform a precipitation reaction, and after centrifugation again, the microvesicles are obtained.
- the operation of centrifuging the cell supernatant for multiple times to obtain the microvesicles is:
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge for 3-10 minutes at a rotation speed of 300 g-500 g, and after removing the second precipitate, the first liquid is obtained;
- the operation to obtain the microvesicles is:
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge for 3-10 minutes at a rotation speed of 300 g-500 g, and after removing the second precipitate, the first liquid is obtained;
- a microvesicle extraction reagent is then added to perform a precipitation reaction, and after centrifugation again, the operation of obtaining the microvesicles is:
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge for 3-10 minutes at a rotation speed of 300 g-500 g, and after removing the second precipitate, the first liquid is obtained;
- the PBS solution was added to the fifth precipitate, centrifuged at a rotation speed of 9000 g-12000 g for 60 minutes, and after the sixth precipitate was removed, the microvesicles were obtained.
- a microvesicle which is obtained by the above-mentioned production method of microvesicles.
- the above-mentioned production method of microvesicles uses an ultrasound device to stimulate cells, which can greatly promote the generation of microvesicles, thereby increasing the production of cell-derived microvesicles, and is helpful for further clinical promotion and biological applications of microvesicles.
- the above-mentioned microvesicle production method adopts the ultrasonic cell stimulation method that does not damage the cells, and is suitable for a variety of cells, including astrocytes, stem cells and the like.
- Fig. 1 is a schematic flow chart of a method for producing microvesicles according to an embodiment
- Figure 2 is a schematic diagram of an embodiment of the process of centrifuging the cell supernatant for multiple times to obtain microvesicles
- FIG. 3 is a schematic diagram of an embodiment of the operation flow of the cell supernatant is subjected to multiple centrifugation treatments, followed by ultrafiltration treatment, to obtain microvesicles;
- FIG. 4 is a schematic diagram of an embodiment of the operation flow diagram of microvesicles obtained by centrifuging the cell supernatant for multiple times, then adding a microvesicle extraction reagent to perform a precipitation reaction, and centrifuging again;
- Figure 5 is a characterization diagram of the number of exosomal particles
- Figure 6 shows the total number of microvesicles in Example 1 and Comparative Example 1;
- Figure 7 shows the cell proliferation after ultrasound stimulation.
- the method for producing microvesicles includes the following steps:
- the cells are sonicated.
- the following steps are further included before sonicating the cells:
- the cells are placed on a serum-free medium for sonication.
- the cells can be cultured in petri dishes or flasks.
- the cells may be suspension cells or adherent cells.
- the types of cells can be nerve cells, glial cells, stem cells, fat cells, tumor cells or immune cells.
- the temperature at which the cells are cultured in a carbon dioxide incubator is 37°C.
- the ultrasonic device used in the ultrasonic processing includes a signal generator, a power amplifier, and an ultrasonic probe
- the power amplifier is connected to the signal generator
- the ultrasonic probe is connected to the power amplifier.
- the ultrasound probe can be a focused probe or a non-focused probe or an array probe.
- the frequency of the ultrasonic probe may be 200KHz-5MHz.
- the ultrasonic energy interval may be 0.2W/cm2-4W/cm2, and the ultrasonic treatment time may be 10s-10min.
- the ultrasonic waves may be continuous waves or pulse waves.
- S20 Place the ultrasonically processed cells in an incubator for 24 to 72 hours, and collect the cell supernatant.
- the incubator is a carbon dioxide incubator.
- the culture time can be 24 hours, 48 hours or 72 hours.
- microvesicles refer to exosomes.
- the step of purifying the cell supernatant to obtain microvesicles can be:
- SB20 Centrifuge the first liquid at a rotation speed of 1500-4000g for 25-60 minutes to remove the third precipitate to obtain the second liquid.
- SB30 Centrifuge the second liquid at a rotation speed of 9000 g-12000 g for 45-90 minutes to remove the fourth precipitate to obtain the third liquid.
- SB40 Centrifuge the third liquid in a 100KDa ultrafiltration tube for 50-120 minutes to remove the fifth precipitate to obtain microvesicles.
- microvesicle extraction reagent is added for precipitation reaction, and after centrifugation again, the operation to obtain microvesicles is:
- SC10 After removing the first precipitate from the cell supernatant, centrifuge for 3-10 minutes at a rotating speed of 300g-500g, and after removing the second precipitate, the first liquid is obtained.
- SC20 Centrifuge the first liquid at a rotation speed of 1500g-4000g for 25-60 minutes to remove the third precipitate to obtain the second liquid.
- SC30 Centrifuge the second liquid for 60 minutes at a rotation speed of 9000 g-12000 g to remove the fourth precipitate to obtain the third liquid.
- SC40 According to the volume ratio of the third liquid and the microvesicle extraction reagent at a ratio of 1:5, add the microvesicle extraction reagent to the third liquid and react for 12-24 hours.
- the microvesicle extraction reagent is Exoquick-TC.
- SC60 Add PBS solution to the fifth precipitate, centrifuge at 9000g-12000g for 60 minutes, and remove the sixth precipitate to obtain microvesicles.
- Ultrasound is a mechanical wave that can propagate in solids and liquids (elastic media) and has a variety of biological effects (mainly including thermal effects, mechanical effects, cavitation effects, etc.).
- the above-mentioned production method of microvesicles uses an ultrasound device to stimulate cells, which can greatly promote the generation of microvesicles, thereby increasing the production of cell-derived microvesicles, and is helpful for further clinical promotion and biological applications of microvesicles.
- the ultrasonic stimulation cell method used does not damage the cells. After ultrasonic stimulation, there is no change in the cell morphology under the microscope.
- the cell proliferation can be detected by cck-8, and the proliferation activity can be seen.
- ctrl represents the control group without ultrasound treatment
- us represents the experimental group after ultrasound treatment. Applicable to a variety of cells, including astrocytes, stem cells, etc.
- microvesicles prepared by the above-mentioned microvesicle production method are quantitatively analyzed by the following method.
- Nanoparticle Tracking Analysis (NTA) technology
- NTA Nanoparticle Tracking Analysis
- direct imaging and observation of specific microvesicles in the suspension in the diameter range of 50nm-1000nm in real time can be accurately obtained in different sizes.
- HA-EXO is microvesicles derived from astrocytes without ultrasound stimulation
- US-HA-EXO is after ultrasound stimulation. Microvesicles derived from astrocytes.
- microvesicles obtained by the above-mentioned microvesicle production method can be used in medicines, and can also be used in scientific research and clinical applications.
- Glial cells were cultured in a carbon dioxide incubator at 37°C. After the cell density reached 80%, the culture medium was replaced with a serum-free medium, and the culture flask or dish was placed on the ultrasonic rack. Use degassed water as a coupling to transfer sound wave energy.
- the ultrasonic device used in the ultrasonic processing includes a signal generator, a power amplifier and an ultrasonic probe, the power amplifier is connected with the signal generator, the ultrasonic probe is connected with the power amplifier, and the ultrasonic probe is a focusing probe.
- the frequency of the ultrasound probe is 200KHz.
- the ultrasonic energy is 2.5W/cm2.
- the ultrasonic treatment time is 5 min. Ultrasound is continuous wave.
- the sonicated cells were cultured in a carbon dioxide incubator for 24 hours, and the cell supernatant was collected.
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge at 400 g for 5 minutes, and after removing the second precipitate, the first liquid is obtained.
- NTA nanoparticle tracking analysis
- Glial cells were cultured in a carbon dioxide incubator at 37°C. After the cell density reached 60%, the culture medium was replaced with a serum-free medium, and the culture flask or dish was placed on the ultrasonic rack. Use degassed water as a coupling to transfer sound wave energy.
- the ultrasonic device used in the ultrasonic processing includes a signal generator, a power amplifier and an ultrasonic probe, the power amplifier is connected with the signal generator, the ultrasonic probe is connected with the power amplifier, and the ultrasonic probe is a focusing probe.
- the frequency of the ultrasound probe is 1MHz.
- the ultrasonic energy is 4.0W/cm2.
- the ultrasonic treatment time is 10s.
- Ultrasound is continuous wave.
- the sonicated cells were cultured in a carbon dioxide incubator for 72 hours, and the cell supernatant was collected.
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge at 400 g for 5 minutes, and after removing the second precipitate, the first liquid is obtained.
- NTA nanoparticle tracking analysis
- Glial cells were cultured in a carbon dioxide incubator at 37°C. After the cell concentration reached 70%, the culture medium was replaced with a serum-free medium, and the culture flask or dish was placed on the ultrasonic rack. Use degassed water as a coupling to transfer sound wave energy.
- the ultrasonic device used in ultrasonic processing includes a signal generator, a power amplifier and an ultrasonic probe, the power amplifier is connected to the signal generator, the ultrasonic probe is connected to the power amplifier, and the ultrasonic probe is a focusing probe.
- the frequency of the ultrasound probe is 5MHz.
- the ultrasonic energy is 0.2W/cm2.
- the ultrasonic treatment time is 10 min.
- Ultrasound is a pulse wave.
- the sonicated cells were cultured in a carbon dioxide incubator for 48 hours, and the cell supernatant was collected.
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge at 400 g for 5 minutes, and after removing the second precipitate, the first liquid is obtained.
- the PBS solution was added to the fifth precipitate and centrifuged at 12000 g for 60 minutes to remove the sixth precipitate to obtain microvesicles.
- NTA nanoparticle tracking analysis
- Glial cells were cultured in a carbon dioxide incubator at 37°C. After the cell density reached 80%, the culture medium was replaced with a serum-free medium, and the culture flask or dish was placed on the ultrasonic rack. Use degassed water as a coupling to transfer sound wave energy.
- the ultrasonic device used in ultrasonic processing includes a signal generator, a power amplifier and an ultrasonic probe, the power amplifier is connected to the signal generator, the ultrasonic probe is connected to the power amplifier, and the ultrasonic probe is a focusing probe.
- the frequency of the ultrasound probe is 200KHz.
- the ultrasonic energy is 2.5W/cm2.
- the ultrasonic treatment time is 5 min. Ultrasound is continuous wave.
- the sonicated cells were cultured in a carbon dioxide incubator for 24 hours, and the cell supernatant was collected.
- NTA nanoparticle tracking analysis
- Glial cells were cultured in a carbon dioxide incubator at 37°C. After the cell density reached 60%, the culture medium was replaced with a serum-free medium, and the culture flask or dish was placed on the ultrasonic rack. Use degassed water as a coupling to transfer sound wave energy.
- the ultrasonic device used in ultrasonic processing includes a signal generator, a power amplifier and an ultrasonic probe, the power amplifier is connected to the signal generator, the ultrasonic probe is connected to the power amplifier, and the ultrasonic probe is a focusing probe.
- the frequency of the ultrasound probe is 1MHz.
- the ultrasonic energy is 4.0W/cm2.
- the ultrasonic treatment time is 10s. Ultrasound is continuous wave.
- the sonicated cells were cultured in a carbon dioxide incubator for 72 hours, and the cell supernatant was collected.
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge for 100 minutes at a rotation speed of 300 g, and after removing the second precipitate, the first liquid is obtained.
- NTA nanoparticle tracking analysis
- Glial cells were cultured in a carbon dioxide incubator at 37°C. After the cell concentration reached 70%, the culture medium was replaced with a serum-free medium, and the culture flask or dish was placed on the ultrasonic rack. Use degassed water as a coupling to transfer sound wave energy.
- the ultrasonic device used in ultrasonic processing includes a signal generator, a power amplifier and an ultrasonic probe, the power amplifier is connected to the signal generator, the ultrasonic probe is connected to the power amplifier, and the ultrasonic probe is a focusing probe.
- the frequency of the ultrasound probe is 5MHz.
- the ultrasonic energy is 0.2W/cm2.
- the ultrasonic treatment time is 10 min.
- Ultrasound is a pulse wave.
- the sonicated cells were cultured in a carbon dioxide incubator for 48 hours, and the cell supernatant was collected.
- the PBS solution was added to the fifth precipitate and centrifuged at 9000 g for 60 minutes to remove the sixth precipitate to obtain microvesicles.
- NTA nanoparticle tracking analysis
- Glial cells were cultured in a carbon dioxide incubator at 37°C. After the cell density reached 60%-80%, the culture medium was replaced with a serum-free medium and cultured for 5 minutes.
- the cells were then placed in a carbon dioxide incubator for continuous cultivation for 24 hours, and the cell supernatant was collected.
- the first liquid After removing the first precipitate from the cell supernatant, centrifuge at 400 g for 5 minutes, and after removing the second precipitate, the first liquid is obtained.
- NTA nanoparticle tracking analysis
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Abstract
Description
Claims (10)
- 一种微囊泡的生产方法,其特征在于,包括以下步骤:将细胞进行超声处理;将超声处理后的细胞置于培养箱中培养24小时~72小时,收集细胞上清;将所述细胞上清进行纯化得到所述微囊泡。
- 如权利要求1所述的微囊泡的生产方法,其特征在于,将细胞进行超声处理前还包括以下步骤:将细胞培养在二氧化碳培养箱中,培养的温度为37℃;当所述细胞的浓度大于等于70%后,将细胞置于无血清培养基上。
- 如权利要求1所述的微囊泡的生产方法,其特征在于,超声能量区间为0.2W/cm2-4W/cm2,超声处理时间为1s-10min。
- 如权利要求1所述的微囊泡的生产方法,其特征在于,超声处理采用的超声装置包括信号发生器、功率放大器和超声探头,所述功率放大器和所述信号发生器连接,所述超声探头和所述功率放大器连接,所述超声探头为聚焦探头或非聚焦探头或阵列探头,频率为200KHz-5MHz。
- 如权利要求1所述的微囊泡的生产方法,其特征在于,将所述细胞上清进行纯化得到所述微囊泡的步骤为:将所述细胞上清进行多次离心处理,得到所述微囊泡;或将所述细胞上清进行多次离心处理后,接着进行超滤处理,得到所述微囊泡;或将所述细胞上清进行多次离心处理后,接着加入微囊泡提取试剂进行沉淀反应,再次离心后,得到所述微囊泡。
- 如权利要求5所述的微囊泡的生产方法,其特征在于,将所述细胞上清进行多次离心,得到所述微囊泡的操作为:将所述细胞上清去除第一沉淀后在转速为300g-500g的条件下离心3-10分钟,去除第二沉淀后,得到第一液体;将所述第一液体在转速为1500g-4000g的条件下离心25-60分钟,去除第三沉淀后,得到第二液体;将所述第二液体在转速为9000g-15000g的条件下离心45-90分钟,去除第四沉淀后,得到第三液体;将所述第三液体在转速为90000g-120000g的条件下离心50-120分钟,去除第五沉淀后,得到所述微囊泡。
- 如权利要求5所述的微囊泡的生产方法,其特征在于,将所述细胞上清进行多次离心处理后,接着进行超滤处理,得到所述微囊泡的操作为:将所述细胞上清去除第一沉淀后在转速为300g-500g的条件下离心3-10分钟,去除第二沉淀后,得到第一液体;将所述第一液体在转速为1500g-4000g的条件下离心25-60分钟,去除第三沉淀后,得到第二液体;将所述第二液体在转速为9000g-12000g的条件下离心45-90分钟,去除第四沉淀后,得到第三液体;将所述第三液体在100KDa超滤管中离心50-120分钟,去除第五沉淀后,得到所述微囊泡。
- 如权利要求5所述的微囊泡的生产方法,其特征在于,将所述细胞上清进行多次离心处理后,接着加入微囊泡提取试剂进行沉淀反应,再次离心后,得到所述微囊泡的操作为:将所述细胞上清去除第一沉淀后在转速为300g-500g的条件下离心3-10分钟,去除第二沉淀后,得到第一液体;将所述第一液体在转速为1500g-4000g的条件下离心25-60分钟,去除第三沉淀后,得到第二液体;将所述第二液体在转速为9000g-12000g的条件下离心60分钟,去除第四沉淀后,得到第三液体;按照所述第三液体和微囊泡提取试剂的体积比为1:5的比例,往第三液体中加入微囊泡提取试剂,反应12-24h小时;在转速为3000g-12000g的条件下离心60分钟,保留第五沉淀;往所述第五沉淀中加入PBS溶液,在转速为9000g-12000g的条件下离心60分钟,去除第六沉淀后,得到所述微囊泡。
- 一种微囊泡,其特征在于,所述微囊泡采用如权利要求1-8任一项所述的微囊泡的生产方法得到。
- 一种采用如权利要求1-8任一项所述的微囊泡的生产方法得到的微囊泡在药物中的应用。
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