WO2022194094A1 - 无细胞脂肪提取物用于治疗脊髓损伤 - Google Patents

无细胞脂肪提取物用于治疗脊髓损伤 Download PDF

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Publication number
WO2022194094A1
WO2022194094A1 PCT/CN2022/080674 CN2022080674W WO2022194094A1 WO 2022194094 A1 WO2022194094 A1 WO 2022194094A1 CN 2022080674 W CN2022080674 W CN 2022080674W WO 2022194094 A1 WO2022194094 A1 WO 2022194094A1
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cell
fat extract
preparation
spinal cord
another preferred
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PCT/CN2022/080674
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English (en)
French (fr)
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张文杰
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上海萨美细胞技术有限公司
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • 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
    • A61K35/35—Fat tissue; Adipocytes; Stromal cells; Connective tissues
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs

Definitions

  • the present invention relates to the field of medicine, in particular to the use of acellular fat extract for treating spinal cord injury.
  • SCI Spinal Cord Injury
  • the nervous system injury is more important than the secondary injury after physical injury, including inflammation, neuronal apoptosis, vacuolar degeneration, edema, and reduced motor function.
  • These pathophysiological processes result in blockade and abnormality of nerve signaling.
  • SCI can be treated by blocking different cascade pathways or applying cytokines, the gradual loss of neurons and the apoptosis of surrounding glial cells pose a great obstacle to the repair of damage. In the prior art, it is still difficult to effectively treat spinal cord injury.
  • the purpose of the present invention is to provide the use of a cell-free fat extract in preventing and/or treating spinal cord injury.
  • the first aspect of the present invention provides the use of a cell-free fat extract for preparing a composition or preparation for preventing and/or treating spinal cord injury.
  • the spinal cord injury is selected from the group consisting of primary spinal cord injury, secondary spinal cord injury, or a combination thereof.
  • the spinal cord injury is selected from the group consisting of acute spinal cord injury, chronic spinal cord injury, or a combination thereof.
  • the spinal cord injury includes spinal cord injury caused by physical injury.
  • the physical injury includes trauma.
  • described prevention and/or treatment of spinal cord injury comprises one or more ways selected from the following group:
  • the motor function includes a limb motor function.
  • the motor function includes hindlimb motor function.
  • the cell-free fat extract is a cell-free fat extract prepared from human or non-human mammalian fat.
  • the non-human mammal is monkey, orangutan, cow, pig, dog, sheep, mouse or rabbit.
  • compositions or preparations include pharmaceutical compositions or preparations, food compositions or preparations, health product compositions or preparations, or dietary supplements.
  • composition or preparation further includes a pharmaceutically, food, health product or dietary acceptable carrier.
  • composition or preparation further includes other drugs for preventing and/or treating spinal cord injury.
  • the other drugs for preventing and/or treating spinal cord injury are selected from the group consisting of drug nerve repair agents, cell transplantation agents, nerve stimulators, neuromodulators, nerve prostheses, or a combination thereof.
  • the other drugs for preventing and/or treating spinal cord injury are selected from the group consisting of steroid hormones, dehydrating agents, drugs for improving circulation, neurotrophic drugs, or combinations thereof.
  • the steroid hormone is selected from the group consisting of prednisone, methylprednisone, or a combination thereof.
  • the dosage form of the composition or preparation is an oral preparation, an external preparation or an injection preparation.
  • the injection preparation is an intravenous injection or an intramuscular injection.
  • the injection preparation is an intraspinal injection preparation.
  • the injection preparation is an injection preparation at the site of spinal cord injury.
  • the dosage form of the composition or preparation is a solid dosage form, a semi-solid dosage form, or a liquid dosage form, such as solution, gel, cream, lotion, ointment, cream, paste, cake, powder, Patches etc.
  • the dosage form of the composition or preparation is powder, granule, capsule, injection, tincture, oral liquid, tablet, hydrogel or lozenge.
  • the dosage form of the composition or preparation is an injectable hydrogel.
  • the injectable hydrogel comprises 1-10% hyaluronic acid, 1-10% methylcellulose, 30-95% artificial cerebrospinal fluid and 1-50% Cellular Fat Extract.
  • composition or preparation is administered externally, topically, or by injection.
  • the cell-free fat extract does not contain cells and does not contain lipid droplets.
  • the lipid droplets are oil droplets released after fat cells are disrupted.
  • the "does not contain lipid droplets" means that in the cell-free fat extract, the volume of oil droplets accounts for less than 1% of the total liquid, preferably less than 0.5%, more preferably less than 0.1%.
  • the cells are selected from the group consisting of endothelial cells, adipose stem cells, macrophages, and stromal cells.
  • the "cell-free” refers to the average number of cells in 1 ml of cell-free fat extract ⁇ 1, preferably ⁇ 0.5, more preferably ⁇ 0.1, or 0.
  • the cell-free fat extract is a naturally-obtained nano-fat extract without added components.
  • the "no added ingredients” means that, except for the rinsing step, no solution, solvent, small molecule, chemical agent, and biological additive are added during the preparation of the fat extract.
  • the cell-free adipose extract is prepared by centrifuging adipose tissue after emulsification.
  • the cell-free fat extract contains one or more components selected from the group consisting of IGF-1, BDNF, GDNF, TGF- ⁇ 1, HGF, bFGF, VEGF, TGF- ⁇ 1 , PDGF, EGF, NT-3, GH, G-CSF, or a combination thereof.
  • the cell-free fat extract contains, but is not limited to, one or more components selected from the group consisting of IGF-1, BDNF, GDNF, bFGF, VEGF, TGF- ⁇ 1, HGF , PDGF, or a combination thereof.
  • the cell-free fat extract is a cell-free fat extract.
  • the concentration of the IGF-1 is 5000-30000pg/ml, preferably 6000-20000pg/ml, more preferably 7000-15000pg/ml , more preferably 8000-12000pg/ml, more preferably 9000-11000pg/ml, more preferably 9500-10500pg/ml.
  • the concentration of BDNF is 800-5000pg/ml, preferably 1000-4000pg/ml, more preferably 1200-2500pg/ml, more Preferably 1400-2000 pg/ml, more preferably 1600-2000 pg/ml, more preferably 1700-1850 pg/ml.
  • the concentration of GDNF is 800-5000pg/ml, preferably 1000-4000pg/ml, more preferably 1200-2500pg/ml, more Preferably 1400-2000 pg/ml, more preferably 1600-2000 pg/ml, more preferably 1700-1900 pg/ml.
  • the concentration of the bFGF is 50-600pg/ml, preferably 100-500pg/ml, more preferably 120-400pg/ml, more Preferably 150-300 pg/ml, more preferably 200-280 pg/ml, more preferably 220-260 pg/ml.
  • the concentration of the VEGF is 50-500pg/ml, preferably 100-400pg/ml, more preferably 120-300pg/ml, more Preferably 150-250 pg/ml, more preferably 170-230 pg/ml, more preferably 190-210 pg/ml.
  • the concentration of TGF- ⁇ 1 is 200-3000pg/ml, preferably 400-2000pg/ml, more preferably 600-1500pg/ml , more preferably 800-1200pg/ml, more preferably 800-1100pg/ml, more preferably 900-1000pg/ml.
  • the concentration of the HGF is 200-3000pg/ml, preferably 400-2000pg/ml, more preferably 600-1500pg/ml, more Preferably 600-1200 pg/ml, more preferably 800-1000 pg/ml, more preferably 850-950 pg/ml.
  • the concentration of PDGF is 50-600pg/ml, preferably 80-400pg/ml, more preferably 100-300pg/ml, more Preferably 140-220 pg/ml, more preferably 160-200 pg/ml, more preferably 170-190 pg/ml.
  • the weight ratio of IGF-1 to VEGF is 20-100:1, preferably 30-70:1, more preferably 40-60:1, most preferably 45-55: 1.
  • the weight ratio of BDNF to VEGF is 2-20:1, preferably 4-15:1, more preferably 6-12:1, and most preferably 8-9.5:1.
  • the weight ratio of GDNF to VEGF is 2-20:1, preferably 4-15:1, more preferably 6-12:1, and most preferably 8.5-9.5:1.
  • the weight ratio of bFGF to VEGF is 0.2-8:1, preferably 0.5-5:1, more preferably 0.6-2:1, more preferably 0.8-1.6:1, Optimally 1-1.5:1.
  • the weight ratio of TGF- ⁇ 1 to VEGF is 1-20:1, preferably 1-15:1, more preferably 1-10:1, more preferably 2-8: 1, preferably 4-6:1.
  • the weight ratio of HGF to VEGF is 1-20:1, preferably 1-15:1, more preferably 1-10:1, more preferably 2-8:1, More preferably 4-5.5:1.
  • the weight ratio of PDGF to VEGF is 0.1-3:1, preferably 0.2-2:1, more preferably 0.4-1.5:1, and most preferably 0.7-1.2:1.
  • the cell-free fat extract is prepared by the following method:
  • Emulsifying the intermediate layer to obtain an emulsified fat mixture also referred to as nano-fat
  • a second aspect of the present invention provides a method for preparing a cell-free fat extract, the method comprising the steps of:
  • Emulsifying the intermediate layer to obtain an emulsified fat mixture also referred to as nano-fat
  • the cell-free fat extract is as described in the first aspect of the present invention.
  • the centrifugation is performed at 800-2500g, preferably 800-2000g, more preferably 1000-1500g, and most preferably 1100-1300g.
  • the centrifugation time is 1-15 minutes, preferably 1-10 minutes, more preferably 1-8 minutes, and optimally 1-5 minutes.
  • the temperature of the centrifugation is 2-6°C.
  • the emulsification is mechanical emulsification.
  • the mechanical emulsification is performed mechanically by repeated blowing through a syringe (eg 20-200 times, preferably 20-150 times, more preferably 20-100 times, more preferably 30-50 times). emulsification.
  • the blowing method is to repeatedly push and beat at a constant speed with two 10ml injection syringes connected to a tee tube.
  • the emulsification is a method of crushing by a tissue homogenizer.
  • the emulsified fat mixture is further frozen and then thawed.
  • the thawed mixture is used for centrifugation after thawing after freezing.
  • the freezing temperature is -50°C to -120°C, preferably -60°C to -100°C, more preferably -70°C to -90°C.
  • the thawing temperature is 20-40°C, preferably 25-40°C, more preferably 37°C.
  • the number of cycles of thawing after freezing is 1-5 times (preferably 1, 2, 3 or 4 times).
  • the emulsified fat mixture is layered into four layers, the first layer is an oil layer, the second layer is a residual adipose tissue layer, and the third layer is a liquid layer layer (ie, the middle liquid layer), and the fourth layer is the cell/tissue debris sedimentation layer.
  • the centrifugation is performed at 800-2500g, preferably 800-2000g, more preferably 1000-1500g, and most preferably 1100-1300g.
  • the centrifugation time is 1-15 minutes, preferably 1-10 minutes, more preferably 2-8 minutes, and optimally 3-7 minutes.
  • the temperature of the centrifugation is 2-6°C.
  • the first layer, the second layer, the third layer and the fourth layer are arranged in order from top to bottom.
  • the intermediate liquid layer is a transparent or substantially transparent layer.
  • the filter bag in the step (6), can remove the adipocytes in the primary fat extract.
  • the filtration and sterilization are performed through a filter (eg, a 0.22 ⁇ m microporous membrane).
  • a filter eg, a 0.22 ⁇ m microporous membrane
  • the filter is a microporous membrane filter.
  • the pore size of the microporous filter membrane is 0.05-0.8 ⁇ m, preferably 0.1-0.5 ⁇ m, more preferably 0.1-0.4 ⁇ m, more preferably 0.15-0.3 ⁇ m, more preferably 0.2-0.25 ⁇ m, optimally 0.22 ⁇ m.
  • the filtration and sterilization are firstly passed through a first filter that can filter out cells, and then passed through a second filter that can filter out pathogens (such as bacteria).
  • filter eg, 0.22 ⁇ m filter.
  • the step (6) further includes sub-packaging the fat extract to form a sub-packaged product.
  • the subpackaged extract can be stored at -20°C for later use; it can be used directly after thawing at low temperature (such as -4°C) or normal temperature, or it can be stored at low temperature (such as 4°C) for a period of time after thawing, and then used ).
  • the third aspect of the present invention provides a cell-free fat extract, which is prepared by the method described in the second aspect of the present invention.
  • the fourth aspect of the present invention provides a composition or formulation comprising (a) the cell-free fat extract according to the third aspect of the present invention; and (b) pharmaceutically, food, Nutraceutical or dietary acceptable carrier or excipient.
  • the composition is a pharmaceutical composition, a food composition, a health product composition or a dietary supplement.
  • the dosage form of the composition or preparation is an oral preparation, an external preparation or an injection preparation.
  • the dosage form of the composition or preparation is powder, granule, capsule, injection, tincture, oral liquid, tablet or lozenge.
  • the injection is an intravenous injection or an intramuscular injection.
  • the injection preparation is an intraspinal injection preparation.
  • the dosage form of the composition or preparation is a solid dosage form, a semi-solid dosage form, or a liquid dosage form, such as solution, gel, cream, lotion, ointment, cream, paste, cake, powder, Patches etc.
  • the mass percentage of the cell-free fat extract is 10 wt %, preferably 1-70 wt %, more preferably 20-60 wt %. total weight.
  • the fifth aspect of the present invention provides a method for preparing the composition or preparation according to the fourth aspect of the present invention, the method comprising the steps of: mixing the cell-free fat extract according to the third aspect of the present invention with a pharmaceutical It is mixed with acceptable carriers or excipients on food, health product or diet to form a composition or preparation.
  • the sixth aspect of the present invention provides a method for preventing and/or treating spinal cord injury by administering the cell-free fat extract according to the third aspect of the present invention to a subject in need.
  • the subject is a human or a non-human mammal.
  • the non-human mammals include rodents, such as rats and mice.
  • the administration mode is oral administration, topical administration or injection administration.
  • the injection is intraspinal injection.
  • the injection is in situ injection at the spinal cord injury site.
  • Figure 1 shows the histological evaluation results of different groups of mice. Among them, Figure 1A shows the H&E staining of mice in different groups; Figure 1B shows the vacuolar degeneration of mice in different groups. "*" indicates, p ⁇ 0.05.
  • the terms “comprising,” “including,” and “containing” are used interchangeably to include not only open definitions, but also semi-closed, and closed definitions. In other words, the terms include “consisting of”, “consisting essentially of”.
  • IGF-1 insulin-like growth factors-1
  • BDNF brain-derived neurotrophic factor
  • GDNF glial cellline-derived neurotrophic factor
  • bFGF basic fibroblast growth factor
  • VEGF vascular endothelial growth factor
  • TGF- ⁇ 1 is referred to as transforming growth factor- ⁇ 1.
  • HGF Hepatocyte Growth Factor
  • PDGF Platelet derived growth factor
  • EGF Epidermal Growth Factor
  • NT-3 As used in the text, the term "NT-3" is referred to as neurotrophins-3.
  • GH Growth Hormone
  • G-CSF granulocyte colony stimulating factor
  • CEFFE Cell free fat extract
  • the terms "cell-free adipose extract of the present invention”, “extract of the present invention”, “fat extract of the present invention” and the like are used interchangeably to refer to the process during the preparation of the fat extract (other than the rinsing step) )
  • An adipose tissue-derived extract (or extract) prepared without the addition of any solutions, solvents, small molecules, chemicals, and biological additives.
  • a typical method for preparing the extract of the present invention is as described above in the second aspect of the present invention.
  • the extract of the present invention does not have to add any additives (or added components) during the preparation process, some or small amounts of safe substances (such as small amounts) that do not negatively or adversely affect the activity of the extract of the present invention may also be added. water).
  • the cell-free fat extract of the present invention can be derived from human adipose tissue, which is purified from nano-fat by removing oil and cell/extracellular matrix fractions after centrifugation, and is a cell-free, easy-to-prepare, rich in various growth factor liquid.
  • the cell-free fat extract is a cell-free fat extract.
  • the cell-free adipose extract of the present invention various cytokines may be included.
  • the cell-free adipose extract comprises IGF-1, BDNF, GDNF, TGF- ⁇ , HGF, bFGF, VEGF, TGF- ⁇ 1, PDGF, EGF, NT-3, GH and G-CSF one or more.
  • the concentration of the IGF-1 is 5000-30000pg/ml, preferably 6000-20000pg/ml, more preferably 7000-15000pg/ml , more preferably 8000-12000pg/ml, more preferably 9000-11000pg/ml, more preferably 9500-10500pg/ml.
  • the concentration of BDNF is 800-5000pg/ml, preferably 1000-4000pg/ml, more preferably 1200-2500pg/ml, more Preferably 1400-2000 pg/ml, more preferably 1600-2000 pg/ml, more preferably 1700-1850 pg/ml.
  • the concentration of GDNF is 800-5000pg/ml, preferably 1000-4000pg/ml, more preferably 1200-2500pg/ml, more Preferably 1400-2000 pg/ml, more preferably 1600-2000 pg/ml, more preferably 1700-1900 pg/ml.
  • the concentration of the bFGF is 50-600pg/ml, preferably 100-500pg/ml, more preferably 120-400pg/ml, more Preferably 150-300 pg/ml, more preferably 200-280 pg/ml, more preferably 220-260 pg/ml.
  • the concentration of the VEGF is 50-500pg/ml, preferably 100-400pg/ml, more preferably 120-300pg/ml, more Preferably 150-250 pg/ml, more preferably 170-230 pg/ml, more preferably 190-210 pg/ml.
  • the concentration of TGF- ⁇ 1 is 200-3000pg/ml, preferably 400-2000pg/ml, more preferably 600-1500pg/ml , more preferably 800-1200pg/ml, more preferably 800-1100pg/ml, more preferably 900-1000pg/ml.
  • the concentration of the HGF is 200-3000pg/ml, preferably 400-2000pg/ml, more preferably 600-1500pg/ml, more Preferably 600-1200 pg/ml, more preferably 800-1000 pg/ml, more preferably 850-950 pg/ml.
  • the concentration of PDGF is 50-600pg/ml, preferably 80-400pg/ml, more preferably 100-300pg/ml, more Preferably 140-220 pg/ml, more preferably 160-200 pg/ml, more preferably 170-190 pg/ml.
  • the weight ratio of IGF-1 to VEGF is 20-100:1, preferably 30-70:1, more preferably 40-60:1, most preferably 45-55: 1.
  • the weight ratio of BDNF to VEGF is 2-20:1, preferably 4-15:1, more preferably 6-12:1, and most preferably 8-9.5:1.
  • the weight ratio of GDNF to VEGF is 2-20:1, preferably 4-15:1, more preferably 6-12:1, and most preferably 8.5-9.5:1.
  • the weight ratio of bFGF to VEGF is 0.2-8:1, preferably 0.5-5:1, more preferably 0.6-2:1, more preferably 0.8-1.6:1, Optimally 1-1.5:1.
  • the weight ratio of TGF- ⁇ 1 to VEGF is 1-20:1, preferably 1-15:1, more preferably 1-10:1, more preferably 2-8: 1, preferably 4-6:1.
  • the weight ratio of HGF to VEGF is 1-20:1, preferably 1-15:1, more preferably 1-10:1, more preferably 2-8:1, More preferably 4-5.5:1.
  • the weight ratio of PDGF to VEGF is 0.1-3:1, preferably 0.2-2:1, more preferably 0.4-1.5:1, and most preferably 0.7-1.2:1.
  • the cell-free fat extract of the present invention is prepared by the method as described in the second aspect of the present invention.
  • the cell-free fat extracts of the present invention are prepared by the following methods:
  • Emulsifying the intermediate layer to obtain an emulsified fat mixture also referred to as nano-fat
  • the centrifugation is performed at 800-2500g, preferably 800-2000g, more preferably 1000-1500g, and most preferably 1100-1300g.
  • the centrifugation time is 1-15 minutes, preferably 1-10 minutes, more preferably 1-8 minutes, and optimally 1-5 minutes.
  • the emulsification is mechanical emulsification.
  • the mechanical emulsification is performed mechanically by repeated blowing through a syringe (eg 20-200 times, preferably 20-150 times, more preferably 20-100 times, more preferably 30-50 times). emulsification.
  • the method of blowing and beating is that two 10ml injection syringes are connected with a tee tube to repeatedly push and beat at a constant speed.
  • the emulsification is a method of crushing by a tissue homogenizer.
  • the emulsified fat mixture is further frozen and then thawed.
  • the thawed mixture is used for centrifugation after thawing after freezing.
  • the freezing temperature is -50°C to -120°C, preferably -60°C to -100°C, more preferably -70°C to -90°C.
  • the thawing temperature is 20-40°C, preferably 25-40°C, more preferably 37°C.
  • the number of cycles of thawing after freezing is 1-5 times (preferably 1, 2, 3 or 4 times).
  • the emulsified fat mixture is layered into four layers, the first layer is an oil layer, the second layer is a residual adipose tissue layer, and the third layer is a liquid layer layer (ie, the middle liquid layer), and the fourth layer is the cell/tissue debris sedimentation layer.
  • the centrifugation is performed at 800-2500g, preferably 800-2000g, more preferably 1000-1500g, and most preferably 1100-1300g.
  • the centrifugation time is 1-15 minutes, preferably 1-10 minutes, more preferably 2-8 minutes, and optimally 3-7 minutes.
  • the first layer, the second layer, the third layer and the fourth layer are arranged in order from top to bottom.
  • the intermediate liquid layer is a transparent or substantially transparent layer.
  • the filter bag in the step (6), can remove the adipocytes in the primary fat extract.
  • the filtration and sterilization are performed through a filter (eg, a 0.22 ⁇ m microporous membrane).
  • a filter eg, a 0.22 ⁇ m microporous membrane
  • the filter is a microporous membrane filter.
  • the pore size of the microporous filter membrane is 0.05-0.8 ⁇ m, preferably 0.1-0.5 ⁇ m, more preferably 0.1-0.4 ⁇ m, more preferably 0.15-0.3 ⁇ m, more preferably 0.2-0.25 ⁇ m, optimally 0.22 ⁇ m.
  • the filtration and sterilization are firstly passed through a first filter that can filter out cells, and then passed through a second filter that can filter out pathogens (such as bacteria).
  • filter eg, 0.22 ⁇ m filter.
  • the step (6) further includes sub-packaging the fat extract to form a sub-packaged product.
  • the subpackaged extract can be stored at -20°C for later use; it can be used directly after thawing at low temperature (such as -4°C) or normal temperature, or it can be stored at low temperature (such as 4°C) for a period of time after thawing, and then used ).
  • the present invention provides the use of a cell-free adipose extract for preparing a composition or preparation for preventing and/or treating spinal cord injury.
  • prevention refers to a method of preventing the onset of a disease and/or its attendant symptoms or protecting a subject from acquiring a disease. "Prevention” as used herein also includes delaying the onset of the disease and/or its attendant symptoms and reducing the risk of the disease in a subject.
  • Treatment includes delaying and stopping the progression of the disease, or eliminating the disease, and does not require 100% inhibition, elimination and reversal.
  • the cell-free adipose extract of the present invention reduces, inhibits and/or reverses spinal cord injury, eg, by at least about 10%, at least about 30%, at least about 50%, or at least about 80%.
  • the spinal cord injury includes (but is not limited to): acute spinal cord injury, chronic spinal cord injury, or a combination thereof.
  • the spinal cord injury includes spinal cord injury caused by trauma.
  • the prevention and/or treatment of spinal cord injury includes one or more methods selected from the following group:
  • the present invention also provides a method for preventing and/or treating spinal cord injury by administering the cell-free adipose extract of the present invention to a subject in need thereof.
  • the subject is a human or a non-human mammal.
  • the non-human mammals include rodents, such as rats and mice.
  • the administration mode is oral administration, topical administration or injection administration.
  • the injection is intraspinal injection.
  • compositions described in the present invention include (but are not limited to): pharmaceutical compositions, food compositions, health care compositions, dietary supplements, and the like.
  • the cell-free fat extracts of the present invention can be prepared into pharmaceutical compositions such as tablets, capsules, powders, microparticles, solutions, lozenges, jellies, creams, elixirs, suspensions, Dosage forms such as tinctures, poultices, liniments, lotions, hydrogels, and aerosols.
  • Pharmaceutical compositions can be prepared by generally known preparation techniques, and suitable pharmaceutical additives can be added to the medicament.
  • composition of the present invention may also include a pharmaceutically, food, health product or dietary acceptable carrier.
  • “Pharmaceutically, food, nutraceutical or dietary acceptable carrier” means: one or more compatible solid or liquid filler or gel substances, which are suitable for human use and must be of sufficient purity and sufficiently low toxicity.
  • “Compatibility” as used herein means that the components of the composition can be admixed with the compounds of the present invention and with each other without significantly reducing the efficacy of the compounds.
  • acceptable carrier moieties are cellulose and its derivatives (such as sodium carboxymethyl cellulose, sodium ethyl cellulose, cellulose acetate, etc.) , gelatin, talc, solid lubricants (such as stearic acid, magnesium stearate), calcium sulfate, vegetable oils (such as soybean oil, sesame oil, peanut oil, olive oil, etc.), polyols (such as propylene glycol, glycerin, mannitol, sorbitol) etc.), emulsifiers (such as Tween ), wetting agents (such as sodium lauryl sulfate), colorants, flavors, stabilizers, antioxidants, preservatives, pyrogen-free water, etc.
  • solid lubricants such as stearic acid, magnesium stearate
  • calcium sulfate such as soybean oil, sesame oil, peanut oil, olive oil, etc.
  • polyols such as propylene glycol, glycerin,
  • the mode of administration of the composition of the present invention is not particularly limited, and representative modes of administration include (but are not limited to): oral, parenteral (intravenous, intramuscular), topical, and preferred modes of administration are oral administration and injection.
  • the injection administration is an intraspinal injection.
  • the dosage form of the composition or preparation of the present invention is an oral preparation, an external preparation or an injection preparation.
  • solid dosage forms for oral administration or administration include capsules, tablets, pills, powders and granules.
  • the active compound is mixed with at least one conventional inert excipient (or carrier), such as sodium citrate or dicalcium phosphate, or with (a) fillers or compatibilizers, for example, starch, lactose, sucrose, glucose, mannitol and silicic acid; (b) binders such as, for example, hydroxymethylcellulose, alginate, gelatin, polyvinylpyrrolidone, sucrose and acacia; (c) humectants, For example, glycerol; (d) disintegrants, such as agar, calcium carbonate, potato or tapioca starch, alginic acid, certain complex silicates, and sodium carbonate; (e) slow solvents, such as paraffin; (f) Absorption accelerators such as sodium citrate
  • Solid dosage forms such as tablets, dragees, capsules, pills and granules can be prepared using coatings and shell materials, such as enteric coatings and other materials well known in the art. They may contain opacifying agents.
  • Liquid dosage forms for oral administration or administration include pharmaceutically acceptable emulsions, solutions, suspensions, syrups or tinctures.
  • liquid dosage forms may contain inert diluents conventionally employed in the art, such as water or other solvents, solubilizers and emulsifiers, for example, ethanol, isopropanol, ethyl carbonate, ethyl acetate, propylene glycol, 1 , 3-butanediol, dimethylformamide and oils, especially cottonseed oil, peanut oil, corn germ oil, olive oil, castor oil and sesame oil or mixtures of these substances.
  • compositions can also contain adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring and perfuming agents.
  • adjuvants such as wetting agents, emulsifying and suspending agents, sweetening, flavoring and perfuming agents.
  • suspensions may contain suspending agents such as ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum methoxide and agar, or mixtures of these substances and the like.
  • suspending agents such as ethoxylated isostearyl alcohols, polyoxyethylene sorbitol and sorbitan esters, microcrystalline cellulose, aluminum methoxide and agar, or mixtures of these substances and the like.
  • compositions for parenteral injection may comprise physiologically acceptable sterile aqueous or anhydrous solutions, dispersions, suspensions or emulsions, and sterile powders for reconstitution into sterile injectable solutions or dispersions.
  • Suitable aqueous and non-aqueous carriers, diluents, solvents or excipients include water, ethanol, polyols and suitable mixtures thereof.
  • Dosage forms for topical administration or administration of the compounds of this invention include ointments, powders, patches, sprays, hydrogels, and inhalants.
  • the active ingredient is mixed under sterile conditions with a physiologically acceptable carrier and any preservatives, buffers, or propellants that may be required if necessary.
  • the cell-free adipose extract of the present invention may be administered or administered alone, or in combination with other drugs for preventing and/or treating spinal cord injury.
  • a safe and effective amount of the cell-free fat extract of the present invention is suitable for human or non-human animals (such as rats, mice, dogs, cats, cows, chickens, ducks, etc.) in need of treatment, wherein the administration
  • the current dose is the effective dose that can be considered as acceptable in pharmacy, food or health care products.
  • the term "safe and effective amount” refers to an amount that produces function or activity in humans and/or animals and is acceptable to humans and/or animals. Those of ordinary skill in the art should understand that the "safe and effective amount” may vary with the form of the pharmaceutical composition, the route of administration, the excipients of the drug used, the severity of the disease, and the combination with other drugs, etc. different.
  • the daily dosage is usually 0.1 to 1000 mg, preferably 1 to 600 mg, and more preferably 2 to 300 mg.
  • the specific dosage should also take into account the route of administration, the patient's health and other factors, which are all within the skill of the skilled physician.
  • the present invention finds for the first time that acellular fat extract has excellent therapeutic effect on spinal cord injury.
  • the cell-free fat extract of the present invention is a cell-free component that can avoid cell-related problems in clinical applications, including, for example, genetic stability after cell processing, cell viability and viability after injection, The multiple administration and storage of cells, and the immunogenicity of cells when using allogeneic fat, the cell-free fat extract of the present invention has the advantages of higher safety and lower side effects in the prevention and treatment of spinal cord injury.
  • Adipose tissue was obtained from 6 healthy women who underwent conventional liposuction, with an average age of 31 years (24-36 years). After local injection of tumescent fluid anesthesia, a 3mm liposuction cannula with a large lateral hole (2mm x 7mm) was used to connect a 20mL syringe, and radial suction was performed under artificial negative pressure. Rinse 3 times with normal saline.
  • the middle layer ie, the fat layer containing adipocytes
  • the mechanically emulsified fat mixture was placed in a -80°C refrigerator for freezing, and then thawed in a 37°C water bath. After a single freeze-thaw cycle, the thawed fat mixture was centrifuged at 1200g at 4°C for 5 minutes to obtain fractions.
  • the layered mixture is divided into 4 layers, the first layer is the oil layer, the second layer is the residual adipose tissue layer, the third layer is the liquid layer, and the fourth layer is the cell/tissue debris precipitation layer, remove the oil layer and For the residual adipose tissue layer, the liquid layer is sucked, and the contamination of the cell/tissue debris sediment layer is avoided during the sucking process, so as to obtain the initial fat extraction solution.
  • the content of cytokines including IGF-1, BDNF, GDNF, bFGF, VEGF, TGF- ⁇ 1, HGF and PDGF, was detected by ELISA immunosorbent assay kit.
  • the average concentrations of 6 samples were as follows: IGF-1 (9840.6pg/ml), BDNF (1764.5pg/ml), GDNF (1831.9pg/ml), bFGF (242.3pg/ml), VEGF (202.9pg/ml), TGF- ⁇ 1 (954.5 pg/ml), HGF (898.4 pg/ml) and PDGF (179.9 pg/ml).
  • CEFFE is a liquid, it is difficult to effectively play a role in the damaged area, so CEFFE is combined with hydrogel for controlled release of CEFFE.
  • Hyaluronic acid HA (1,500 kDa) and methylcellulose MC (13 kDa) were purchased from MACKLIN (Shanghai, China). The 0.1% HA aqueous solution was filter filtered and lyophilized under sterile conditions. MC is handled in the same way. The HA powder was added to the aCSF (artificial cerebrospinal fluid) solution of MC overnight to obtain a mixture of 2 wt % HA and 7 wt % MC, which is HAMC hydrogel.
  • aCSF artificial cerebrospinal fluid
  • HAMC/CEFFE The preparation of HAMC/CEFFE is similar to the above. After aCSF is prepared, CEFFE is added (the ratio is 1:1), and then MC and HA are added respectively according to the above process to obtain a mixture of HAMC/CEFFE with 2wt% HA and 7wt% MC. liquid, namely HAMC/CEFFE hydrogel.
  • mice 9-week-old C57 mice were randomly divided into the following 3 groups: PBS injection (PBS group), HAMC injection (HAMC group), HAMC/CEFFE injection (HAMC/CEFFE group), with 8 mice in each group.
  • PBS group PBS injection
  • HAMC group HAMC injection
  • HAMC/CEFFE injection HAMC/CEFFE group
  • mice in PBS group, HAMC group and HAMC/CEFFE group are as follows:
  • mice were anesthetized, the back hair was shaved. The skin and muscle were incised, and the posterior lamina was removed using microscopic equipment. Then use precision Dumont forceps to test the dorsal side of the spinal cord to a depth of 2mm for 30s.
  • a 34-gauge needle on the NanoFil microinjection system was inserted into the spinal cord at the injury site approximately 20 ⁇ m deep, and then the various mice were administered as follows:
  • PBS group 1 ⁇ l PBS was slowly injected into the spinal cord lesion area
  • HAMC group 1 ⁇ l HAMC hydrogel was slowly injected into the spinal cord lesion area;
  • HAMC/CEFFE group 1 ⁇ l HAMC/CEFFE hydrogel was slowly injected into the spinal cord lesion area;
  • mice in each group After the administration of the mice in each group, the incisions were sutured in layers, and the mice in each group were placed in a greenhouse with free access to food and water. During the recovery period, the bladder was manually emptied twice a day.
  • mice were also selected as the control group.
  • the mice in the control group received laminectomy as described above, but did not undergo spinal cord injury (SCI) surgery, and were fed normally without any drug treatment.
  • SCI spinal cord injury
  • mice in each group were sacrificed on the 28th day after administration. After the sacrifice, the spinal cord was removed from the injured area, immersed in 4% paraformaldehyde, fixed in paraffin for 24 hours, embedded in paraffin, routinely sliced in paraffin, stained with H&E, and photographed under a light microscope. (3 random fields/specimen), Image J software calculates the proportion of vacuolar area.
  • BMS lower limb activity score
  • CEFFE can effectively reduce inflammation, vacuolar degeneration and edema after spinal cord injury, and improve motor function after spinal cord injury, thus indicating that CEFFE has excellent therapeutic effect on spinal cord injury.

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Abstract

一种无细胞脂肪提取物的用途，用于制备组合物或制剂，所述组合物或制剂用于预防和/或治疗脊髓损伤。所述的无细胞脂肪提取物对脊髓损伤具有优异的治疗效果。

Description

无细胞脂肪提取物用于治疗脊髓损伤 技术领域
本发明涉及药物领域，具体涉及无细胞脂肪提取物用于治疗脊髓损伤。
背景技术
脊髓损伤(Spinal Cord Injury，SCI)是全球最严重的公共卫生问题之一，往往会造成运动、感觉和自主神经功能的永久性丧失。当经历物理损伤后，神经系统损伤除了原发损伤外更为重要的就是继发性的损害，包括了炎症、神经元凋亡、空泡变性、水肿和运动功能降低等。这些病理生理过程导致了神经信号传导的阻断和异常。虽然可以通过阻断不同的级联通路或者施加细胞因子来治疗SCI，但是神经元的逐渐丢失以及周围胶质细胞的凋亡为损伤的修复带来了极大的障碍。现有技术中，仍然难以对脊髓损伤进行有效的治疗。
因此，本领域需要开发一种能够有效治疗脊髓损伤的药物。
发明内容
本发明的目在于提供一种无细胞脂肪提取物在预防和/或治疗脊髓损伤方面中的用途。
本发明第一方面，提供一种无细胞脂肪提取物的用途，用于制备组合物或制剂，所述组合物或制剂用于预防和/或治疗脊髓损伤。
在另一优选例中，所述的脊髓损伤选自下组：原发性脊髓损伤、继发性脊髓损伤，或其组合。
在另一优选例中，所述的脊髓损伤选自下组：急性脊髓损伤、慢性脊髓损伤，或其组合。
在另一优选例中，所述的脊髓损伤包括由物理损伤导致的脊髓损伤。
在另一优选例中，所述的物理损伤包括创伤。
在另一优选例中，所述的预防和/或治疗脊髓损伤包括选自下组的一种或多 种方式进行：
(i)减轻损伤脊髓处的炎症；
(ii)减轻损伤脊髓的空泡变性；
(iii)减轻损伤脊髓的水肿；和/或
(iv)改善运动功能。
在另一优选例中，所述的运动功能包括四肢运动功能。
在另一优选例中，所述的运动功能包括后肢运动功能。
在另一优选例中，所述的无细胞脂肪提取物为从人或非人哺乳动物中的脂肪中提取制备获得的无细胞脂肪提取物。
在另一优选例中，所述的非人哺乳动物为猴、猩猩、牛、猪、狗、羊、鼠或兔。
在另一优选例中，所述的组合物或制剂包括药物组合物或制剂、食品组合物或制剂、保健品组合物或制剂或膳食补充剂。
在另一优选例中，所述的组合物或制剂还包括药学上、食品上、保健品或膳食上可接受的载体。
在另一优选例中，所述的组合物或制剂还包括其它预防和/或治疗脊髓损伤的药物。
在另一优选例中，所述的其它预防和/或治疗脊髓损伤的药物选自下组：药物神经修复剂、细胞移植剂、神经刺激剂、神经调节剂、神经假体，或其组合。
在另一优选例中，所述的其它预防和/或治疗脊髓损伤的药物选自下组：类固醇激素、脱水剂、改善循环的药物、神经营养药物，或其组合。
在另一优选例中，所述的类固醇激素选自下组：泼尼松、甲基泼尼松，或其组合。
在另一优选例中，所述的组合物或制剂的剂型为口服制剂、外用制剂或注射制剂。
在另一优选例中，所述的注射制剂为静脉注射剂或肌肉注射剂。
在另一优选例中，所述的注射制剂为脊髓内注射制剂。
在另一优选例中，所述的注射制剂为脊髓损伤部位的注射制剂。
在另一优选例中，所述组合物或制剂的剂型为固体剂型、半固体剂型、或液体剂型，如溶液、凝胶、膏霜、乳液、膏剂、霜剂、糊剂、饼、粉剂、贴剂等。
在另一优选例中，所述组合物或制剂的剂型为粉剂、颗粒剂、胶囊剂、注射剂、酊剂、口服液、片剂、水凝胶剂或含片。
在另一优选例中，所述组合物或制剂的剂型为可注射的水凝胶剂。
在另一优选例中，所述可注射的水凝胶剂包括1-10％的透明质酸、1-10％的甲基纤维素、30-95％的人工脑脊液和1-50％的无细胞脂肪提取物。
在另一优选例中，所述的组合物或制剂通过外用、局部、或注射方式施用。
在另一优选例中，所述无细胞脂肪提取物不含有细胞且不含有脂滴。
在另一优选例中，所述脂滴为脂肪细胞破碎后释放的油滴。
在另一优选例中，所述“不含有脂滴”指所述无细胞脂肪提取物中，油滴体积占总液体百分比小于1％，优选地小于0.5％，更优选地小于0.1％。
在另一优选例中，所述细胞选自下组：内皮细胞、脂肪干细胞、巨噬血细胞、基质细胞。
在另一优选例中，所述“无细胞”指1ml无细胞脂肪提取物中的细胞平均数量≤1个，优选地≤0.5个，更佳地≤0.1个，或为0个。
在另一优选例中，所述无细胞脂肪提取物为天然获得的无添加成分的纳米脂肪提取物。
在另一优选例中，所述“无添加成分的”指除漂洗步骤外，在所述脂肪提取物的制备过程中未添加任何溶液、溶剂、小分子、化学制剂、和生物添加剂。
在另一优选例中，所述种无细胞脂肪提取物是通过将脂肪组织经过乳化后离心制备获得。
在另一优选例中，所述的无细胞脂肪提取物含有一种或多种选自下组的组分：IGF-1、BDNF、GDNF、TGF-β1、HGF、bFGF、VEGF、TGF-β1、PDGF、EGF、NT-3、GH、G-CSF，或其组合。
在另一优选例中，所述的种无细胞脂肪提取物含有但不限于一种或多种选自下组的组分：IGF-1、BDNF、GDNF、bFGF、VEGF、TGF-β1、HGF、PDGF，或其组合。
在另一优选例中，所述的无细胞脂肪提取物为无细胞脂肪提取液。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的IGF-1的浓度为5000-30000pg/ml，较佳地6000-20000pg/ml，更佳地7000-15000pg/ml，更佳地8000-12000pg/ml，更佳地9000-11000pg/ml，更佳地9500-10500pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的BDNF的浓度为800-5000pg/ml，较佳地1000-4000pg/ml，更佳地1200-2500pg/ml，更佳地1400-2000pg/ml，更佳地1600-2000pg/ml，更佳地1700-1850pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的GDNF的浓度为800-5000pg/ml，较佳地1000-4000pg/ml，更佳地1200-2500pg/ml，更佳地1400-2000pg/ml，更佳地1600-2000pg/ml，更佳地1700-1900pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的bFGF的浓度为50-600pg/ml，较佳地100-500pg/ml，更佳地120-400pg/ml，更佳地150-300pg/ml，更佳地200-280pg/ml，更佳地220-260pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的VEGF的浓度为50-500pg/ml，较佳地100-400pg/ml，更佳地120-300pg/ml，更佳地150-250pg/ml，更佳地170-230pg/ml，更佳地190-210pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的TGF-β1的浓度为200-3000pg/ml，较佳地400-2000pg/ml，更佳地600-1500pg/ml，更佳地800-1200pg/ml，更佳地800-1100pg/ml，更佳地900-1000pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的HGF的浓度为200-3000pg/ml，较佳地400-2000pg/ml，更佳地600-1500pg/ml，更佳地600-1200pg/ml，更佳地800-1000pg/ml，更佳地850-950pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的PDGF的浓度为50-600pg/ml，较佳地80-400pg/ml，更佳地100-300pg/ml，更佳地140-220pg/ml，更佳地160-200pg/ml，更佳地170-190pg/ml。
在另一优选例中，所述的IGF-1与VEGF的重量比为20-100：1，较佳地30-70：1，更佳地40-60：1，最佳地45-55：1。
在另一优选例中，所述的BDNF与VEGF的重量比为2-20：1，较佳地4-15：1， 更佳地6-12：1，最佳地8-9.5：1。
在另一优选例中，所述的GDNF与VEGF的重量比为2-20：1，较佳地4-15：1，更佳地6-12：1，最佳地8.5-9.5：1。
在另一优选例中，所述的bFGF与VEGF的重量比为0.2-8：1，较佳地0.5-5：1，更佳地0.6-2：1，更佳地0.8-1.6：1，最佳地1-1.5：1。
在另一优选例中，所述的TGF-β1与VEGF的重量比为1-20：1，较佳地1-15：1，更佳地1-10：1，更佳地2-8：1，更佳地4-6：1。
在另一优选例中，所述的HGF与VEGF的重量比为1-20：1，较佳地1-15：1，更佳地1-10：1，更佳地2-8：1，更佳地4-5.5：1。
在另一优选例中，所述的PDGF与VEGF的重量比为0.1-3：1，较佳地0.2-2：1，更佳地0.4-1.5：1，最佳地0.7-1.2：1。
在另一优选例中，所述的无细胞脂肪提取物通过以下方法制备：
(1)提供一脂肪组织原料，将所述脂肪组织原料破碎，并进行漂洗(如用生理盐水)，从而获得经漂洗的脂肪组织；
(2)对所述经漂洗后的脂肪组织进行离心，获得分层的混合物；
(3)对所述分层的混合物，去除上层油层和下层水层，收集中间层(即含脂肪细胞的脂肪层)；
(4)对所述中间层进行乳化，获得乳化的脂肪混合物(也称为纳米脂肪)；
(5)将所述乳化的脂肪混合物通过离心处理，从而获得中间液体层，即为脂肪初提物；和
(6)对所述脂肪初提物进行过滤和除菌，从而获得无细胞的脂肪提取物。
本发明第二方面，提供一种制备无细胞脂肪提取物的方法，所述的方法包括步骤：
(1)提供一脂肪组织原料，将所述脂肪组织原料破碎，并进行漂洗(如用生理盐水)，从而获得经漂洗的脂肪组织；
(2)对所述经漂洗后的脂肪组织进行离心，获得分层的混合物；
(3)对所述分层的混合物，去除上层油层和下层水层，收集中间层(即含脂肪细 胞的脂肪层)；
(4)对所述中间层进行乳化，获得乳化的脂肪混合物(也称为纳米脂肪)；
(5)将所述乳化的脂肪混合物通过离心处理，从而获得中间液体层，即为脂肪初提物；和
(6)对所述脂肪初提物进行过滤和除菌，从而获得无细胞的脂肪提取物。
在另一优选例中，所述的无细胞脂肪提取物如本发明第一方面所述。
在另一优选例中，所述的步骤(2)中，所述离心在800-2500g下离心，较佳地800-2000g，更佳地1000-1500g，最佳地1100-1300g。
在另一优选例中，所述的步骤(2)中，所述离心的时间为1-15min，较佳地1-10min，更佳地1-8min，最佳地1-5min。
在另一优选例中，所述的离心的温度为2-6℃。
在另一优选例中，所述的步骤(4)中，所述的乳化为机械乳化。
在另一优选例中，所述机械乳化为经注射器反复吹打(如吹打20-200次，较佳地20-150次，更佳地20-100次，更佳地30-50次)进行机械乳化。
在另一优选例中，所述的吹打的方式为2个10ml注射针筒连接三通管反复匀速推打。
在另一优选例中，，所述的步骤(4)中，所述乳化为通过组织匀浆机打碎的方法。
在另一优选例中，所述的步骤(5)中，在将所述乳化的脂肪混合物通过离心处理前，还包括对所述乳化的脂肪混合物冷冻后解冻处理。
在另一优选例中，冷冻后解冻处理后，将解冻后的混合物用于离心。
在另一优选例中，所述的冷冻的温度为-50℃至-120℃，较佳地-60℃至-100℃，更佳地-70℃至-90℃。
在另一优选例中，所述的解冻的温度为20-40℃，较佳地25-40℃，更佳地37℃。
在另一优选例中，所述的冷冻后解冻的循环次数为1-5次(优选为1、2、3或4次)。
在另一优选例中，所述的步骤(5)中，离心后，所述乳化的脂肪混合物分层4层，第一层为油层，第二层为残余脂肪组织层，第三层为液体层(即为中间液 体层)，第四层为细胞/组织碎片沉淀层。
在另一优选例中，所述的步骤(5)中，所述离心在800-2500g下离心，较佳地800-2000g，更佳地1000-1500g，最佳地1100-1300g。
在另一优选例中，所述的步骤(5)中，所述离心的时间为1-15min，较佳地1-10min，更佳地2-8min，最佳地3-7min。
在另一优选例中，所述的离心的温度为2-6℃。
在另一优选例中，所述的步骤(5)中，第一层、第二层、第三层和第四层从上到下依次排列。
在另一优选例中，所述的步骤(5)中，所述的中间液体层为透明或基本透明层。
在另一优选例中，所述的步骤(6)中，所述的过滤包能够将脂肪初提物中的脂肪细胞除去。
在另一优选例中，所述的步骤(6)中，所述的过滤和除菌是通过滤器(如0.22μm微孔滤膜)进行。
在另一优选例中，所述的过滤器为微孔滤膜过滤器。
在另一优选例中，所述的微孔滤膜的孔径大小为0.05-0.8μm，较佳地0.1-0.5μm，更佳地0.1-0.4μm，更佳地0.15-0.3μm，更佳地0.2-0.25μm，最佳地0.22μm。
在另一优选例中，所述的步骤(6)中，所述的过滤和除菌是先通过可滤去细胞的第一过滤器，然后再通过可滤去病原体(如细菌)的第二滤器(如0.22μm的滤器)进行的。
在另一优选例中，所述的步骤(6)中，还包括对所述脂肪提取物进行分装，形成分装的产品。(所述分装后的提取物可于-20℃保存待用；可低温(如-4℃)或常温解冻后直接使用，或解冻后置于低温(如4℃)保存一段时间，然后使用)。
本发明第三方面，提供一种无细胞脂肪提取物，所述的无细胞脂肪提取物通过如本发明第二方面所述的方法制备获得。
本发明第四方面，提供一种组合物或制剂，所述的组合物或制剂包含(a)如本 发明第三方面所述的无细胞脂肪提取物；和(b)药学上、食品上、保健品或膳食上可接受的载体或赋形剂。
在另一优选例中，所述的组合物为药物组合物、食品组合物、保健品组合物或膳食补充剂。
在另一优选例中，所述的组合物或制剂的剂型为口服制剂、外用制剂或注射制剂。
在另一优选例中，所述组合物或制剂的剂型为粉剂、颗粒剂、胶囊剂、注射剂、酊剂、口服液、片剂或含片。
在另一优选例中，所述的注射剂为静脉注射剂或肌肉注射剂。
在另一优选例中，所述的注射制剂为脊髓内注射制剂。
在另一优选例中，所述组合物或制剂的剂型为固体剂型、半固体剂型、或液体剂型，如溶液、凝胶、膏霜、乳液、膏剂、霜剂、糊剂、饼、粉剂、贴剂等。
在另一优选例中，在所述组合物或制剂中，无细胞脂肪提取物的质量百分比为10wt％，较佳地1-70wt％，更佳地20-60wt％，以组合物或制剂的总重量计。
本发明第五方面，提供一种制备如本发明第四方面所述的组合物或制剂的方法，所述的方法包括步骤：将如本发明第三方面所述的无细胞脂肪提取物与药学上、食品上、保健品或膳食上可接受的载体或赋形剂混合，从而形成组合物或制剂。
本发明第六方面，提供一种预防和/或治疗脊髓损伤的方法，对需要的对象施用如本发明第三方面所述的的无细胞脂肪提取物。
在另一优选例中，所述的对象为人或非人哺乳动物。
在另一优选例中，所述非人哺乳动物包括啮齿动物，如大鼠、小鼠。
在另一优选例中，所述的施用方式为口服、外用或注射施用。
在另一优选例中，所述的注射为脊髓内注射。
在另一优选例中，所述的注射为脊髓损伤部位原位注射。
应理解，在本发明范围内中，本发明的上述各技术特征和在下文(如实施例) 中具体描述的各技术特征之间都可以互相组合，从而构成新的或优选的技术方案。限于篇幅，在此不再一一累述。
附图说明
图1为不同组小鼠的组织学评价结果。其中，图1A为不同组小鼠的H&E染色；图1B为不同组小鼠的空泡变性。“*”表示，p＜0.05。
图2为不同组小鼠给药后不同时间点的后BMS评分(n＝8)，“※”表示，p＜0.05。
具体实施方式
本发明人经过广泛而深入的研究，首次开发了无细胞脂肪提取物对脊髓损伤具有优异的治疗作用。
术语
除非另有定义，否则本文中所用的所有技术和科学术语的含义与本发明所属领域普通技术人员普遍理解的含义相同。
如本文所用，术语“包括”、“包含”与“含有”可互换使用，不仅包括开放式定义，还包括半封闭式、和封闭式定义。换言之，所述术语包括了“由……构成”、“基本上由……构成”。
如文本所用，术语“IGF-1”称为胰岛素样生长因子1(insulin-like growth factors-1)。
如文本所用，术语“BDNF”称为脑源性神经营养因子(brain-derived neurotrophic factor，BDNF)。
如文本所用，术语“GDNF”称为胶质细胞源性神经营养因子(glialcellline-derivedneurotrophicfactor)。
如文本所用，术语“bFGF”称为碱性成纤维细胞生长因子(basic fibroblast growth factor)。
如文本所用，术语“VEGF”称为血管内皮生长因子(vascular endothelial growth factor)。
如文本所用，术语“TGF-β1”称为转化生长因子-β1(transforming growth factor-β1)。
如文本所用，术语“HGF”称为肝细胞生长因子
如文本所用，术语“PDGF”称为血小板衍生生长因子(Platelet derived growth factor)
如文本所用，术语“EGF”称为表皮细胞生长因子(Epidermal Growth Factor)
如文本所用，术语“NT-3”称为神经营养因子3(neurotrophins-3)。
如文本所用，术语“GH”称为生长激素(Growth Hormone)。
如文本所用，术语“G-CSF”称为粒细胞集落刺激因子(granulocyte colony stimulating factor)。
无细胞脂肪提取物(Cell free fat extract，CEFFE)及其制备方法
如本文所用，术语“本发明的无细胞脂肪提取物”、“本发明提取物”、“本发明的脂肪提取物”等可互换使用，指在脂肪提取物制备过程中(除漂洗步骤外)未添加任何溶液、溶剂、小分子、化学制剂、和生物添加剂所制备的源自脂肪组织的提取物(或提取液)。一种典型的制备本发明提取物的方法如上本发明第二方面中所述。此外，应理解，虽然本发明提取物在制备过程中不必添加任何添加剂(或添加成分)，但是也可以添加一些或少量的对本发明提取物的活性无负面或不利影响的安全的物质(如少量水)。
本发明的无细胞脂肪提取物可来源于人类脂肪组织，它是通过离心后除去油和细胞/细胞外基质部分而从纳米脂肪中提纯出来的，是一种无细胞、易于制备、富含各种生长因子的液体。
在本发明的一个优选例中，所述的无细胞脂肪提取物为无细胞脂肪提取液。
在本发明所述的无细胞脂肪提取物，可以包括多种细胞因子。代表性地，所述的无细胞脂肪提取物包括IGF-1、BDNF、GDNF、TGF-β、HGF、bFGF、VEGF、TGF-β1、PDGF、EGF、NT-3、GH和G-CSF中的一种或多种。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的IGF-1的浓度为5000-30000pg/ml，较佳地6000-20000pg/ml，更佳地7000-15000pg/ml，更佳地 8000-12000pg/ml，更佳地9000-11000pg/ml，更佳地9500-10500pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的BDNF的浓度为800-5000pg/ml，较佳地1000-4000pg/ml，更佳地1200-2500pg/ml，更佳地1400-2000pg/ml，更佳地1600-2000pg/ml，更佳地1700-1850pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的GDNF的浓度为800-5000pg/ml，较佳地1000-4000pg/ml，更佳地1200-2500pg/ml，更佳地1400-2000pg/ml，更佳地1600-2000pg/ml，更佳地1700-1900pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的bFGF的浓度为50-600pg/ml，较佳地100-500pg/ml，更佳地120-400pg/ml，更佳地150-300pg/ml，更佳地200-280pg/ml，更佳地220-260pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的VEGF的浓度为50-500pg/ml，较佳地100-400pg/ml，更佳地120-300pg/ml，更佳地150-250pg/ml，更佳地170-230pg/ml，更佳地190-210pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的TGF-β1的浓度为200-3000pg/ml，较佳地400-2000pg/ml，更佳地600-1500pg/ml，更佳地800-1200pg/ml，更佳地800-1100pg/ml，更佳地900-1000pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的HGF的浓度为200-3000pg/ml，较佳地400-2000pg/ml，更佳地600-1500pg/ml，更佳地600-1200pg/ml，更佳地800-1000pg/ml，更佳地850-950pg/ml。
在另一优选例中，在所述的无细胞脂肪提取物中，所述的PDGF的浓度为50-600pg/ml，较佳地80-400pg/ml，更佳地100-300pg/ml，更佳地140-220pg/ml，更佳地160-200pg/ml，更佳地170-190pg/ml。
在另一优选例中，所述的IGF-1与VEGF的重量比为20-100：1，较佳地30-70：1，更佳地40-60：1，最佳地45-55：1。
在另一优选例中，所述的BDNF与VEGF的重量比为2-20：1，较佳地4-15：1，更佳地6-12：1，最佳地8-9.5：1。
在另一优选例中，所述的GDNF与VEGF的重量比为2-20：1，较佳地4-15：1，更佳地6-12：1，最佳地8.5-9.5：1。
在另一优选例中，所述的bFGF与VEGF的重量比为0.2-8：1，较佳地0.5-5：1，更佳地0.6-2：1，更佳地0.8-1.6：1，最佳地1-1.5：1。
在另一优选例中，所述的TGF-β1与VEGF的重量比为1-20：1，较佳地1-15：1，更佳地1-10：1，更佳地2-8：1，更佳地4-6：1。
在另一优选例中，所述的HGF与VEGF的重量比为1-20：1，较佳地1-15：1，更佳地1-10：1，更佳地2-8：1，更佳地4-5.5：1。
在另一优选例中，所述的PDGF与VEGF的重量比为0.1-3：1，较佳地0.2-2：1，更佳地0.4-1.5：1，最佳地0.7-1.2：1。
优选地，本发明所述的无细胞脂肪提取物通过如上述本发明第二方面所述的方法制备获得。
代表性地，本发明所述的无细胞脂肪提取物通过以下方法制备：
(1)提供一脂肪组织原料，将所述脂肪组织原料破碎，并进行漂洗(如用生理盐水)，从而获得经漂洗的脂肪组织；
(2)对所述经漂洗后的脂肪组织进行离心，获得分层的混合物；
(3)对所述分层的混合物，去除上层油层和下层水层，收集中间层(即含脂肪细胞的脂肪层)；
(4)对所述中间层进行乳化，获得乳化的脂肪混合物(也称为纳米脂肪)；
(5)将所述乳化的脂肪混合物通过离心处理，从而获得中间液体层，即为脂肪初提物；和
(6)对所述脂肪初提物进行过滤和除菌，从而获得无细胞的脂肪提取物。
在另一优选例中，所述的步骤(2)中，所述离心在800-2500g下离心，较佳地800-2000g，更佳地1000-1500g，最佳地1100-1300g。
在另一优选例中，所述的步骤(2)中，所述离心的时间为1-15min，较佳地1-10min，更佳地1-8min，最佳地1-5min。
在另一优选例中，所述的步骤(4)中，所述的乳化为机械乳化。
在另一优选例中，所述机械乳化为经注射器反复吹打(如吹打20-200次，较佳地20-150次，更佳地20-100次，更佳地30-50次)进行机械乳化。
在另一优选例中，所述的吹打的方式为2个10ml注射针筒连接三通管反复匀 速推打。
在另一优选例中，所述的步骤(4)中，所述乳化为通过组织匀浆机打碎的方法。
在另一优选例中，所述的步骤(5)中，在将所述乳化的脂肪混合物通过离心处理前，还包括对所述乳化的脂肪混合物冷冻后解冻处理。
在另一优选例中，冷冻后解冻处理后，将解冻后的混合物用于离心。
在另一优选例中，所述的冷冻的温度为-50℃至-120℃，较佳地-60℃至-100℃，更佳地-70℃至-90℃。
在另一优选例中，所述的解冻的温度为20-40℃，较佳地25-40℃，更佳地37℃。
在另一优选例中，所述的冷冻后解冻的循环次数为1-5次(优选为1、2、3或4次)。
在另一优选例中，所述的步骤(5)中，离心后，所述乳化的脂肪混合物分层4层，第一层为油层，第二层为残余脂肪组织层，第三层为液体层(即为中间液体层)，第四层为细胞/组织碎片沉淀层。
在另一优选例中，所述的步骤(5)中，所述离心在800-2500g下离心，较佳地800-2000g，更佳地1000-1500g，最佳地1100-1300g。
在另一优选例中，所述的步骤(5)中，所述离心的时间为1-15min，较佳地1-10min，更佳地2-8min，最佳地3-7min。
在另一优选例中，所述的步骤(5)中，第一层、第二层、第三层和第四层从上到下依次排列。
在另一优选例中，所述的步骤(5)中，所述的中间液体层为透明或基本透明层。
在另一优选例中，所述的步骤(6)中，所述的过滤包能够将脂肪初提物中的脂肪细胞除去。
在另一优选例中，所述的步骤(6)中，所述的过滤和除菌是通过滤器(如0.22μm微孔滤膜)进行。
在另一优选例中，所述的过滤器为微孔滤膜过滤器。
在另一优选例中，所述的微孔滤膜的孔径大小为0.05-0.8μm，较佳地0.1-0.5μm， 更佳地0.1-0.4μm，更佳地0.15-0.3μm，更佳地0.2-0.25μm，最佳地0.22μm。
在另一优选例中，所述的步骤(6)中，所述的过滤和除菌是先通过可滤去细胞的第一过滤器，然后再通过可滤去病原体(如细菌)的第二滤器(如0.22μm的滤器)进行的。
在另一优选例中，所述的步骤(6)中，还包括对所述脂肪提取物进行分装，形成分装的产品。(所述分装后的提取物可于-20℃保存待用；可低温(如-4℃)或常温解冻后直接使用，或解冻后置于低温(如4℃)保存一段时间，然后使用)。
用途
本发明提供一种无细胞脂肪提取物的用途，用于制备组合物或制剂，所述组合物或制剂用于预防和/或治疗脊髓损伤。
在本发明中，术语“预防”表示预防疾病和/或它的附随症状的发作或者保护对象免于获得疾病的方法。本文中使用的"预防"还包括延迟疾病和/或它的附随症状的发作和降低对象的得病的风险。
本发明所述的“治疗”包括延缓和终止疾病的进展，或消除疾病，并不需要100％抑制、消灭和逆转。在一些实施方案中，与不存在本发明所述的无细胞脂肪提取物观相比，本发明所述无细胞脂肪提取物减轻、抑制和/或逆转了脊髓损伤例如至少约10％、至少约30％、至少约50％、或至少约80％。
在本发明一个优选例中，所述的脊髓损伤包括(但不限于)：急性脊髓损伤、慢性脊髓损伤，或其组合。
代表性地，所述的脊髓损伤包括由创伤导致的脊髓损伤。
在本发明一个优选例中，所述的预防和/或治疗脊髓损伤包括选自下组的一种或多种方式进行：
(i)减轻损伤脊髓处的炎症；
(ii)减轻损伤脊髓的空泡变性；
(iii)减轻损伤脊髓的水肿；和/或
(iv)改善运动功能。
本发明还提供一种预防和/或治疗脊髓损伤的方法，对需要的对象施用如本发明所述的的无细胞脂肪提取物。
在另一优选例中，所述的对象为人或非人哺乳动物。
在另一优选例中，所述非人哺乳动物包括啮齿动物，如大鼠、小鼠。
在另一优选例中，所述的施用方式为口服、外用或注射施用。
在另一优选例中，所述的注射为脊髓内注射。
组合物和施用
本发明所述的组合物包括(但并不限于)：药物组合物、食品组合物、保健组合物、膳食补充剂等。
代表性地，可将本发明的无细胞脂肪提取物制备成药物组合物，诸如片剂、胶囊、粉剂、微粒剂、溶液剂、锭剂、胶冻、乳膏制剂、醑剂、悬液、酊、泥敷剂、搽剂、洗剂、水凝胶剂和气雾剂之类的剂型。药物组合物能够由通常已知的制备技术来制备，并且合适的药物添加剂能够被添加到该药物中。
本发明的组合物还可以包括药学上、食品上、保健品或膳食上可接受的载体。“药学上、食品上、保健品或膳食上可接受的载体”指的是：一种或多种相容性固体或液体填料或凝胶物质，它们适合于人使用，而且必须有足够的纯度和足够低的毒性。“相容性”在此指的是组合物中各组份能和本发明的化合物以及它们之间相互掺和，而不明显降低化合物的药效。药学上、食品上、保健品或膳食上可接受的载体可以接受的载体部分例子有纤维素及其衍生物(如羧甲基纤维素钠、乙基纤维素钠、纤维素乙酸酯等)、明胶、滑石、固体润滑剂(如硬脂酸、硬脂酸镁)、硫酸钙、植物油(如豆油、芝麻油、花生油、橄榄油等)、多元醇(如丙二醇、甘油、甘露醇、山梨醇等)、乳化剂(如吐温
Figure PCTCN2022080674-appb-000001
)、润湿剂(如十二烷基硫酸钠)、着色剂、调味剂、稳定剂、抗氧化剂、防腐剂、无热原水等。
本发明组合物施用方式没有特别限制，代表性的施用方式包括(但并不限于)：口服、肠胃外(静脉内、肌肉内)、局部施用，优选的施用方式为口服施用和注射施用。例如，所述的注射施用为脊髓内注射。
本发明所述的组合物或制剂的剂型为口服制剂、外用制剂或注射制剂。代表 性地，用于口服施用或给药的固体剂型包括胶囊剂、片剂、丸剂、散剂和颗粒剂。在这些固体剂型中，活性化合物与至少一种常规惰性赋形剂(或载体)混合，如柠檬酸钠或磷酸二钙，或与下述成分混合：(a)填料或增容剂，例如，淀粉、乳糖、蔗糖、葡萄糖、甘露醇和硅酸；(b)粘合剂，例如，羟甲基纤维素、藻酸盐、明胶、聚乙烯基吡咯烷酮、蔗糖和阿拉伯胶；(c)保湿剂，例如，甘油；(d)崩解剂，例如，琼脂、碳酸钙、马铃薯淀粉或木薯淀粉、藻酸、某些复合硅酸盐、和碳酸钠；(e)缓溶剂，例如石蜡；(f)吸收加速剂，例如，季胺化合物；(g)润湿剂，例如鲸蜡醇和单硬脂酸甘油酯；(h)吸附剂，例如，高岭土；和(i)润滑剂，例如，滑石、硬脂酸钙、硬脂酸镁、固体聚乙二醇、十二烷基硫酸钠，或其混合物。胶囊剂、片剂和丸剂中，剂型也可包含缓冲剂。
固体剂型如片剂、糖丸、胶囊剂、丸剂和颗粒剂可采用包衣和壳材制备，如肠衣和其它本领域公知的材料。它们可包含不透明剂。
用于口服施用或给药的液体剂型包括药学上可接受的乳液、溶液、悬浮液、糖浆或酊剂。除了活性化合物外，液体剂型可包含本领域中常规采用的惰性稀释剂，如水或其它溶剂，增溶剂和乳化剂，例知，乙醇、异丙醇、碳酸乙酯、乙酸乙酯、丙二醇、1，3-丁二醇、二甲基甲酰胺以及油，特别是棉籽油、花生油、玉米胚油、橄榄油、蓖麻油和芝麻油或这些物质的混合物等。
除了这些惰性稀释剂外，组合物也可包含助剂，如润湿剂、乳化剂和悬浮剂、甜味剂、娇味剂和香料。
除了活性成分外，悬浮液可包含悬浮剂，例如，乙氧基化异十八烷醇、聚氧乙烯山梨醇和脱水山梨醇酯、微晶纤维素、甲醇铝和琼脂或这些物质的混合物等。
用于肠胃外注射的组合物可包含生理上可接受的无菌含水或无水溶液、分散液、悬浮液或乳液，和用于重新溶解成无菌的可注射溶液或分散液的无菌粉末。适宜的含水和非水载体、稀释剂、溶剂或赋形剂包括水、乙醇、多元醇及其适宜的混合物。
用于局部施用或给药的本发明化合物的剂型包括软膏剂、散剂、贴剂、喷射剂、水凝胶剂和吸入剂。活性成分在无菌条件下与生理上可接受的载体及任 何防腐剂、缓冲剂，或必要时可能需要的推进剂一起混合。
本发明无细胞脂肪提取物可以单独施用或给药，或者与其它预防和/或治疗脊髓损伤的药物联合施用或给药。
施用组合物时，是将安全有效量的本发明无细胞脂肪提取物适用于需要治疗的人或非人动物(如大鼠、小鼠、狗、猫、牛、鸡、鸭等)，其中施用时剂量为药学上、食品上或保健品上可接受认为的有效给药剂量。如本文所用，术语“安全有效量”，是指对人和/或动物产生功能或活性的且可被人和/或动物所接受的量。本领域的普通技术人员应该理解，所述的“安全有效量”可随着药物组合物的形式、给药途径、所用药物的辅料、疾病的严重程度以及与其他药物联合用药等情况的不同而有所不同。例如，对于60kg体重的人而言，日给药剂量通常为0.1～1000mg，优选1～600mg，更优选为2-300mg。当然，具体剂量还应考虑给药途径、病人健康状况等因素，这些都是熟练医师技能范围之内的。
本发明的主要优点包括：
1.本发明首次发现无细胞脂肪提取物对脊髓损伤具有优异的治疗效果。
2.本发明所述的无细胞脂肪提取物是一种无细胞组分，可以避免临床应用中与细胞相关的问题，例如包括细胞加工后的遗传稳定性，注射后的细胞活性和存活率，细胞的多次给药储存，以及使用同种异体脂肪时细胞的免疫原性，本发明所述的无细胞脂肪提取物在防治脊髓损伤中有着较高的安全性和较低副作用的优势。
下面结合具体实施例，进一步阐述本发明。应理解，这些实施例仅用于说明本发明而不用于限制本发明的范围。下列实施例中未注明具体条件的实验方法，通常按照常规条件，或按照制造厂商所建议的条件。除非另外说明，否则百分比和份数按重量计算。
实施例1
1.无细胞脂肪提取液(CEFFE)的制备
脂肪由自愿者在获得知情同意的条件下获得。无细胞脂肪组织提取液的制备 方法如下：
(1)脂肪组织获取自6名常规脂肪抽吸术的健康女性，平均年龄31岁(24-36岁)。局部注射肿胀液麻醉后，使用具有大侧孔(2mm x 7mm)的3mm吸脂抽脂套管连接20mL注射器，人工负压下放射状抽吸，将获得的脂肪直立静止，去除肿胀液后，用生理盐水漂洗3遍。
(2)取经漂洗后的脂肪组织，置于离心管中，放入离心机中以1200g 4℃离心3分钟后，获得分层的混合物。
(3)对所述分层的混合物，去除上层油层和下层水层，收集中间层(即含脂肪细胞的脂肪层)。
(4)对所述中间层，用2个10ml注射针筒连接三通管反复匀速推打30次，从而进行机械乳化，并获得经机械乳化的脂肪混合物(也称为纳米脂肪)。
(5)将所述经机械乳化的脂肪混合物置入-80℃冰箱冷冻，再进行37℃水浴解冻，单次冻融循环后，将解冻后的脂肪混合物以1200g 4℃离心5分钟，获得分层的混合物，分层的混合物共分为4层，第一层为油层，第二层为残余脂肪组织层，第三层为液体层，第四层为细胞/组织碎片沉淀层，去除油层和残余脂肪组织层，吸取液体层，吸取过程中避免细胞/组织碎片沉淀层污染，从而得到脂肪初提取液。
(6)将得到的脂肪初提取液经0.22μm滤器过滤除菌，从而灭菌并去除可能混有的活细胞，从而获得无细胞脂肪提取液(CEFFE)，分装冻存于-20℃保存，使用时4℃解冻。
对制备得到的无细胞脂肪提取液，使用ELISA免疫吸附测定试剂盒检测细胞因子含量，包括IGF-1、BDNF、GDNF、bFGF、VEGF、TGF-β1、HGF和PDGF等细胞因子。6例样本检测平均浓度如下：IGF-1(9840.6pg/ml)、BDNF(1764.5pg/ml)、GDNF(1831.9pg/ml)、bFGF(242.3pg/ml)、VEGF(202.9pg/ml)、TGF-β1(954.5pg/ml)、HGF(898.4pg/ml)和PDGF(179.9pg/ml)。
2.实验方法
2.1 HAMC和HAMC/CEFFE的制备
由于血脑屏障的存在，尾静脉注射药物难以到达脊髓损伤区域，因此采用原位移植的方式。同时，由于CEFFE为液体，难以有效在损伤区域发挥作用，因此将CEFFE结合水凝胶，用于控释CEFFE。
透明质酸HA(1,500kDa)和甲基纤维素MC(13kDa)购自MACKLIN(中国上海)。将0.1％HA水溶液经过滤器过滤，并在无菌条件下冻干。MC以同样的方式处理。将HA粉末加入到MC的aCSF(人工脑脊液)溶液中过夜，得到2wt％的HA和7wt％的MC的混合液，即为HAMC水凝胶。
HAMC/CEFFE的制备和上述相似，在aCSF制备后加入CEFFE(比例为1：1)，然后再按照上述流程分别加入MC和HA，得到2wt％的HA和7wt％的MC的HAMC/CEFFE的混合液，即HAMC/CEFFE水凝胶。
2.2小鼠脊髓损伤模型建立、分组及给药
将9周龄C57小鼠随机分为以下3组：PBS注射(PBS组)、HAMC注射(HAMC组)、HAMC/CEFFE注射(HAMC/CEFFE组)，每组8只小鼠。
PBS组、HAMC组、HAMC/CEFFE组小鼠的脊髓损伤模型建立和药物给药方式如下：
脊髓损伤手术在中胸区域(T8-T9)进行，采用精密Dumont镊进行脊髓损伤处理。将小鼠麻醉后，剃除背部毛发。切开皮肤及肌肉，采用显微器材去除后方椎板。然后用精密Dumont镊对脊髓背侧试压，压迫到2mm的深度，持续30s。用NanoFil显微注射系统上的34号针头刺入损伤部位的脊髓约20μm深，然后各种小鼠给药方式如下：
PBS组：将1μl PBS缓慢注入到脊髓病变区域；
HAMC组：将1μl HAMC水凝胶缓慢注入到脊髓病变区域；
HAMC/CEFFE组：将1μl HAMC/CEFFE水凝胶缓慢注入到脊髓病变区域；
各组小鼠给药结束后，然后分层缝合切口，让各组小鼠放置于温室，可自由地获得食物和水。恢复期每天人工排空膀胱2次。
此外，还选取8只小鼠作为对照组，对照组小鼠接受如上所述椎板切除术，没有接受脊髓损伤(SCI)手术，且正常饲养，不施用任何药物处理。
2.3组织学评价
在给药后28日处死各组小鼠，处死后，以损伤区域为中心取出脊髓，浸泡于4％多聚甲醛，固定24h后石蜡包埋，常规做石蜡切片，H&E染色，光学显微镜下拍照(3个随机视野/标本)，Image J软件计算空泡区域比例。
2.4功能学评价
各自小鼠给药后，应用小鼠下肢活动评分(BMS)来评估后肢的运动行为，BMS的评分标准如下表1所示，BMS评分越高，表明运动功能越强，对各组每只小鼠每周记录评分，连续记录4周。
表1 BMS的评分标准
Figure PCTCN2022080674-appb-000002
2.5统计学分析
数据采用SPSS软件进行单因素ANOVA检验，对数据差异显著性进行统计分析，结果以平均数±标准差表示。
3.实验结果
不同组小鼠的组织学评价结果如图1所示，从图1A和图1B可以看出，与PBS组和HAMC组小鼠相比，HAMC/CEFFE组的小鼠的脊髓损伤后的炎症、空泡变性和水肿显著减轻，空泡变性具有统计学差异(图1B，p＜0.05)，从而表明CEFFE对脊髓损伤具有优异的治疗效果。
不同组小鼠的功能学评价结果如图2所示，从图2中可以看出，小鼠脊髓损伤后后肢功能评分显著下降。与PBS组和HAMC组小鼠相比，HAMC/CEFFE组的小鼠的BMS评分显著提高，具有统计学意义，表明CEFFE能够有效改善脊髓损伤的后肢运动功能，因此，CEFFE对脊髓损伤具有优异的治疗效果。
结论:
从实施例可以看出，CEFFE能够有效降低脊髓损伤后的炎症、空泡变性和水肿，且改善脊髓损伤后的运动功能，从而表明CEFFE对脊髓损伤具有优异的治疗效果。
在本发明提及的所有文献都在本申请中引用作为参考，就如同每一篇文献被单独引用作为参考那样。此外应理解，在阅读了本发明的上述讲授内容之后，本领域技术人员可以对本发明作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。

Claims (14)

  1. 一种无细胞脂肪提取物的用途，其特征在于，用于制备组合物或制剂，所述组合物或制剂用于预防和/或治疗脊髓损伤。
  2. 如权利要求1所述的用途，其特征在于，所述的脊髓损伤包括由物理损伤导致的脊髓损伤。
  3. 如权利要求1所述的用途，其特征在于，所述的预防和/或治疗脊髓损伤包括选自下组的一种或多种方式进行：
    (i)减轻损伤脊髓处的炎症；
    (ii)减轻损伤脊髓的空泡变性；
    (iii)减轻损伤脊髓的水肿；和/或
    (iv)改善运动功能。
  4. 如权利要求1所述的用途，其特征在于，所述的组合物或制剂包括药物组合物或制剂、食品组合物或制剂、保健品组合物或制剂或膳食补充剂。
  5. 如权利要求1所述的用途，其特征在于，所述的组合物或制剂的剂型为口服制剂、外用制剂或注射制剂。
  6. 如权利要求1所述的用途，其特征在于，所述的组合物或制剂的剂型为注射制剂。
  7. 如权利要求1所述的用途，其特征在于，所述的组合物或制剂的剂型为脊髓内注射制剂。
  8. 如权利要求7所述的用途，其特征在于，所述的组合物或制剂的剂型为可注射的水凝胶剂。
  9. 如权利要求8所述的用途，其特征在于，所述的可注射的水凝胶剂包括1-10wt％的透明质酸、1-10wt％的甲基纤维素、30-95wt％的人工脑脊液和1-50wt％的无细胞脂肪提取物。
  10. 如权利要求1所述的用途，其特征在于，所述的无细胞脂肪提取物含有一种或多种选自下组的组分：IGF-1、BDNF、GDNF、TGF-β1、HGF、bFGF、VEGF、TGF-β1、HGF、PDGF、EGF、NT-3、GH、G-CSF，或其组合。
  11. 如权利要求10所述的用途，其特征在于，所示的无细胞脂肪提取物包括选自下组的一种或多种特征：
    在所述的无细胞脂肪提取物中，所述的IGF-1的浓度为5000-30000pg/ml，较佳地6000-20000pg/ml，更佳地7000-15000pg/ml，更佳地8000-12000pg/ml，更佳地9000-11000pg/ml，更佳地9500-10500pg/ml；
    在所述的无细胞脂肪提取物中，所述的BDNF的浓度为800-5000pg/ml，较佳地1000-4000pg/ml，更佳地1200-2500pg/ml，更佳地1400-2000pg/ml，更佳地1600-2000pg/ml，更佳地1700-1850pg/ml；
    在所述的无细胞脂肪提取物中，所述的GDNF的浓度为800-5000pg/ml，较佳地1000-4000pg/ml，更佳地1200-2500pg/ml，更佳地1400-2000pg/ml，更佳地1600-2000pg/ml，更佳地1700-1900pg/ml；
    在所述的无细胞脂肪提取物中，所述的bFGF的浓度为50-600pg/ml，较佳地100-500pg/ml，更佳地120-400pg/ml，更佳地150-300pg/ml，更佳地200-280pg/ml，更佳地220-260pg/ml；
    在所述的无细胞脂肪提取物中，所述的VEGF的浓度为50-500pg/ml，较佳地100-400pg/ml，更佳地120-300pg/ml，更佳地150-250pg/ml，更佳地170-230pg/ml，更佳地190-210pg/ml；
    在所述的无细胞脂肪提取物中，所述的TGF-β1的浓度为200-3000pg/ml，较佳地400-2000pg/ml，更佳地600-1500pg/ml，更佳地800-1200pg/ml，更佳地800-1100pg/ml，更佳地900-1000pg/ml；
    在所述的无细胞脂肪提取物中，所述的HGF的浓度为200-3000pg/ml，较佳地400-2000pg/ml，更佳地600-1500pg/ml，更佳地600-1200pg/ml，更佳地800-1000pg/ml，更佳地850-950pg/ml；和/或
    在所述的无细胞脂肪提取物中，所述的PDGF的浓度为50-600pg/ml，较佳地80-400pg/ml，更佳地100-300pg/ml，更佳地140-220pg/ml，更佳地160-200pg/ml，更佳地170-190pg/ml。
  12. 如权利要求10所述的用途，其特征在于，所示的无细胞脂肪提取物包括选自下组的一种或多种特征：
    所述的IGF-1与VEGF的重量比为20-100：1，较佳地30-70：1，更佳地40-60：1，最佳地45-55：1；
    所述的BDNF与VEGF的重量比为2-20：1，较佳地4-15：1，更佳地6-12：1，最佳地8-9.5：1；
    所述的GDNF与VEGF的重量比为2-20：1，较佳地4-15：1，更佳地6-12：1，最佳地8.5-9.5：1；
    所述的bFGF与VEGF的重量比为0.2-8：1，较佳地0.5-5：1，更佳地0.6-2：1，更佳地0.8-1.6：1，最佳地1-1.5：1；
    所述的TGF-β1与VEGF的重量比为1-20：1，较佳地1-15：1，更佳地1-10：1，更佳地2-8：1，更佳地4-6：1；
    所述的HGF与VEGF的重量比为1-20：1，较佳地1-15：1，更佳地1-10：1，更佳地2-8：1，更佳地4-5.5：1；和/或
    所述的PDGF与VEGF的重量比为0.1-3：1，较佳地0.2-2：1，更佳地0.4-1.5：1，最佳地0.7-1.2：1。
  13. 如权利要求1所述的用途，其特征在于，所述的无细胞脂肪提取物通过以下方法制备：
    (1)提供一脂肪组织原料，将所述脂肪组织原料破碎，并进行漂洗(如用生理盐水)，从而获得经漂洗的脂肪组织；
    (2)对所述经漂洗后的脂肪组织进行离心，获得分层的混合物；
    (3)对所述分层的混合物，去除上层油层和下层水层，收集中间层(即含脂肪细胞的脂肪层)；
    (4)对所述中间层进行乳化，获得乳化的脂肪混合物(也称为纳米脂肪)；
    (5)将所述乳化的脂肪混合物通过离心处理，从而获得中间液体层，即为脂肪初提物；和
    (6)对所述脂肪初提物进行过滤和除菌，从而获得无细胞的脂肪提取物。
  14. 一种预防和/或治疗脊髓损伤的方法，其特征在于，对需要的对象施用无细胞脂肪提取物。
PCT/CN2022/080674 2021-03-15 2022-03-14 无细胞脂肪提取物用于治疗脊髓损伤 WO2022194094A1 (zh)

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