WO2015027727A1 - 一种制备动物脱细胞组织基质材料的方法及其制备的组织基质材料 - Google Patents
一种制备动物脱细胞组织基质材料的方法及其制备的组织基质材料 Download PDFInfo
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3683—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3683—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment
- A61L27/3687—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment characterised by the use of chemical agents in the treatment, e.g. specific enzymes, detergents, capping agents, crosslinkers, anticalcification agents
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3683—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment
- A61L27/3691—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment characterised by physical conditions of the treatment, e.g. applying a compressive force to the composition, pressure cycles, ultrasonic/sonication or microwave treatment, lyophilisation
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
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- A61L27/58—Materials at least partially resorbable by the body
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
- A61L2300/252—Polypeptides, proteins, e.g. glycoproteins, lipoproteins, cytokines
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/40—Preparation and treatment of biological tissue for implantation, e.g. decellularisation, cross-linking
Definitions
- the present invention relates to the field of biological tissue processing and tissue matrix material preparation technology, and in particular to a method for preparing an animal acellular tissue matrix material and a prepared acellular tissue matrix material. Background technique
- Biomatrix materials made from allogeneic or xenogeneic tissue and organ decellularization have been successfully used in clinical medical tissue repair and repair.
- Decellularized tissue and organ matrix is also widely used in various tissue engineering experiments and regenerative medicine research, such as removing the original cellular components of animal tissues and organs, and recellularizing the tissue organ matrix with three-dimensional framework structure by human cells in vitro. Functionalized, the final production can be transplanted into the tissues and organs of the human body.
- the tissue organ matrix is a three-dimensional framework composed of various complex structural proteins and functional proteins, and contains many other complexes that are active.
- the main components include collagen fibers, glycoproteins, sticky proteins, etc.
- Other ingredients include sugars such as aminodextran (hyaluronic acid, chondroitin sulfate), some lipids and growth factors.
- Good tissue organ matrices have suitable biomechanical strength. Upon implantation into the host, the matrix material provides initial biomechanical support to regulate cell behavior (such as adhesion, migration, proliferation, and differentiation) by interacting with host cells. As the host cells grow in, the tissue matrix itself gradually degrades and transforms into new tissue.
- tissue and organ materials are derived from human and various mammalian tissues, including blood vessels, heart valves, ligaments, nerves, skin, intestinal mucosa, anterior stomach, pericardium, peritoneum, tendons and bladder.
- the process of preparing tissue and organ matrix is very complicated, including the process of tissue organ harvesting, preservation, cleaning, disinfection, decellularization, antigenicity reduction, virus inactivation and terminal sterilization.
- There are various methods for preparing tissue and organ matrix and according to the principle of decellularization, it can be divided into physical, chemical, enzymatic ultrasonic, mechanical massage or pressurization, freezing and thawing to destroy the cell membrane, and release the cellular components. It is more conducive to the subsequent decellularization of chemical detergents.
- Physical methods are generally not sufficient to achieve complete decellularization. Enzymatic treatments, such as certain trypsin, can regulate the tightness of the extracellular matrix of the tissue and sever the connection between the cell surface and the extracellular matrix of the tissue.
- tissue and substrate matrices are also different using different processes and methods.
- the collection, preservation, cleaning, disinfection and decellularization of tissues and organs, in addition to the direct damage to the tissue and substrate matrix, will also affect the subsequent processing.
- Each treatment will affect the biochemical composition of the tissue and organ matrix, the ultrastructural and biomechanical properties of the three-dimensional framework, which will affect the host's response to the implanted matrix material.
- Preclinical animal experiments and human clinical application evidence show that there are great differences in tissue repair and regeneration performance between various tissue and substrate products.
- the changes in tissue and substrate properties during preparation are the most common differences in clinical effects of various products.
- the present invention is directed to the above-discussed deficiencies in the prior art, and in one aspect provides a method of preparing an animal decellularized matrix material comprising the steps of:
- tissue material is disinfected and sterilized in a moderately alkaline solution, rinsed with sterile pure water, and the pH is adjusted to neutral;
- enzymatic methods are used to remove cellular components, remove alpha-Gal antigen, and enhance stent flexibility.
- the animal tissue material in step 1 is selected from the group consisting of skin, dermis, arteries, veins, stomach, cartilage, meniscus, small intestine, large intestine, diaphragm, tendon, ligament, nerve tissue, bladder, urethra and ureter .
- the blood and other soils are washed with pure water in step 1, Washing is done using physical methods or ultrasound.
- a step of cryopreservation of the porcine dermal material is involved, wherein the rate of temperature drop and temperature rise is a very important parameter. If the temperature is lowered too fast or the tissue is uneven, it may cause micro-cracks in the local area of the tissue, and the tissue matrix is easily torn when used.
- the tissue material in step 1 is preferably stored at an average rate of no more than 1.0 degrees Celsius per minute to -40 degrees Celsius or less, more preferably 0.5 degrees Celsius per minute.
- the tissue material stored at a low temperature is slowly thawed at a temperature of 5 to 12 degrees Celsius to avoid cracks in the tissue due to excessive temperature rise. After the ice is completely dissolved, the thawed tissue material in step 2 is rehydrated for 3 to 6 hours in physiological saline containing 100 mg of gentamicin per liter.
- the cryopreservation in step 1 is long-term preservation by placing the pig dermal material flat on a slightly larger area of cotton gauze, paper, plastic film, nylon mesh or other fabric protection.
- the dermis and the above protective layer are rolled into a multi-layer concentric roll or a multi-layered package form in which the dermis and the protective layer are alternately placed, placed in a plastic bag, sealed and placed in a -80 or -40 ° C. freezer.
- initial sterilization sterilization of pig dermal raw materials is involved.
- Existing methods include the use of sodium hypochlorite, peracetic acid, hydrogen peroxide, iodine solutions and high concentrations of sodium hydroxide (pH 13 or higher). After treatment with these solutions, the tissue matrix is damaged to varying degrees, especially sodium hydroxide, sodium hypochlorite and breaking solutions.
- the moderately alkaline solution described in the step 3 is sodium hydrogencarbonate or sodium hydroxide having a pH of 10.5 to 11.5 or an ammonia hydroxide solution having a concentration of 0.1%, and the sterilization is performed.
- the method is to soak the tissue material after rehydration in the above moderate alkaline solution, and slowly soak for 24 to 48 hours to avoid damage of the tissue matrix.
- the decellularization method described in the step 4 is a sterilization and rinsing of the tissue material at 2.0 mmol of calcium chloride, 2.0 mmol of magnesium chloride, and 100 mg of G. grandis per liter.
- the physiological saline solution was rinsed at room temperature for 1 to 3 hours, and then the cells were eluted by adding a dispase solution.
- the dispase solution is a neutral dispersion enzyme solution containing 1-20 mmol of calcium chloride, 1-20 mmol of magnesium chloride and 50-400 units of dispase per liter.
- the method of eluting the cells by the dispase solution is to soak the tissue material in the dispase solution and slowly soak for 24 to 36 hours at 37 degrees Celsius.
- the neutral dispase solution contains 2.0 mmol of calcium chloride, 2.0 mmol of magnesium chloride and 100 to 200 units of dispase per liter.
- a washing step is performed after the decellularization is completed in step 4.
- the washing comprises a first detergent washing and a second detergent washing, wherein the first detergent solution is 0.5% poly dissolved in a hydroxyethylpiperazine ethylsulfide acid buffer solution (pH 7.0 to 8.0) Ethylene glycol octyl phenyl ether, the cleaning method is to soak the tissue material in the first detergent solution, and slowly soak for 12-18 hours at 37 degrees Celsius.
- the second detergent solution is a 1.0% sodium deoxycholate solution dissolved in a phosphate buffer solution (pH 7.2 ⁇ 7.8).
- the cleaning method is to soak the tissue material in the two detergent solution, and slowly shake the soak at room temperature. ⁇ 36 hours.
- detergents such as Tween-20, tert-octylphenoxy polyethylene ethoxyethanol and 3-[(3-cholesterosylpropyl)didecylamino] may also be used in the present invention.
- tissue matrix Due to the presence of animal tissue DNA, tissue matrix is prone to inflammatory reactions after implantation in humans.
- other mammals contain ⁇ -Gal consisting of glycoproteins or glycolipids at the disaccharide end of the ⁇ -1,3-galactose residue [Gala(l,3)Gal].
- antigen The a-Gal antigen in pig tissue causes immune rejection.
- One of the ways to eliminate or overcome inflammatory and rejection reactions is to use specific enzymatic treatment to remove DNA and a Gal antigen from animal tissue matrices.
- the decomposing animal tissue DNA component described in the step 5 is completed by adding a deoxyribonuclease solution, and the deoxyribonuclease solution is formulated to be 100 mM trishydroxyl thiol per liter.
- Aminoguanidine-hydrochloric acid buffer solution pH 7.2
- the method of degrading animal tissue DNA is to soak the tissue material in The above deoxyribonuclease solution was slowly shaken at 37 ° C for 18 to 28 hours, and then rinsed twice with physiological saline for 1 to 3 hours.
- the decomposing animal tissue ⁇ -Gal antigen described in the step 6 is completed by adding an ⁇ -galactosidase solution, and the formulation of the ⁇ -galactosidase solution is per liter. 10 mM hydroxyethylpiperazine ethanesulfonic acid buffer solution (between pH 7.0 and 8.0) was added with 2.0 mM calcium chloride, 2.0 mM magnesium chloride and 400 GALU units of ⁇ -galactosidase to decompose animal tissue a-Gal.
- the antigen is obtained by soaking the tissue material in the above ⁇ -galactosidase solution and slowly shaking it at 37 ° C for 24 to 36 hours.
- the salting-out method is selected for washing, and the high-concentration sodium chloride solution described in the step 6 is a 2-5% sodium chloride solution, and the rinsing method is a tissue material. Soak in the above sodium chloride solution and wash twice at room temperature for 2 to 4 hours each time.
- the high concentration sodium chloride solution is preferably a 3% sodium chloride solution.
- sodium chloride solution can also be replaced by other neutral salt solutions, such as potassium chloride, magnesium chloride and lithium chloride.
- the invention relates to a virus inactivation treatment, wherein the virus inactivating reagent in the step (7) is hydrogen peroxide and peracetic acid by immersing the tissue material in the method.
- the virus inactivating reagent in the step (7) is hydrogen peroxide and peracetic acid by immersing the tissue material in the method.
- the virus is inactivated by containing 0.02% hydrogen peroxide, 0.15% acetic acid and 0.10% peroxyacetic acid, and the number of viruses can be reduced by 10 to 6 times in 2 to 3 hours.
- the concentration of hydrogen peroxide, acetic acid and peracetic acid can vary with the number of bacteria and increase or decrease.
- step 7 after the virus of step 7 is inactivated, it is rinsed three times with a neutral phosphoric acid buffer at room temperature for 2 to 4 hours to remove residual hydrogen peroxide, acetic acid and peracetic acid.
- Terminal sterilization of tissue products is often one of the most disruptive steps to tissue material.
- step 9 is treated with low temperature radiation.
- the terminal sterilization of the product with 10-50 kGy gamma rays is carried out at -40 degrees Celsius, which greatly reduces the damage to the tissue material.
- the amount of radiation agent is varied, increased or decreased depending on the amount of bacteria in the tissue matrix.
- the terminal sterilization of the product is carried out using gamma rays of 20 to 30 kGy.
- the present invention may also freeze the tissue matrix and sterilize it with ethylene oxide gas.
- step 4 enzyme decellularization
- step 5 enzyme breakdown of DNA
- step 6 enzyme decomposition of alpha-1,3-galactose residue antigen
- the sequence of step 4 (enzymatic decellularization), step 5 (enzymatic breakdown of DNA) and step 6 may be based on actual needs. Make adjustments and changes. For example, it is possible to first decompose the ⁇ -1,3-galactose residue antigen, then decellularize and decompose the animal DNA component; or first decompose the animal DNA, then decompose the antigen and finally decellularize.
- DNase is used.
- concentration, temperature and time of the dispase are monitored and optimized during the treatment.
- a specific enzyme inhibitor such as ethylenediaminetetraacetic acid may also be added to inhibit the activity of the dispase.
- Another aspect of the present invention also relates to an animal decellularized tissue matrix material prepared by the above method of the present invention, wherein the animal dermal raw material for use may include a dermis having a basement membrane, and may also include a dermis which removes the basement membrane.
- the method of preparing a decellularized tissue matrix material of the present invention involves a series of steps of treating animal skin tissue and preparing a tissue organ substrate, and a plurality of biochemical solutions and formulations.
- the dermal tissue matrix material prepared by the above steps and solution retains the original basic scaffold structure, main biochemical composition and biomechanical strength of the tissue extracellular matrix; effectively removes the immune rejection reaction in the animal tissue.
- Antigen improved flexibility, drape and wound surface integration of tissue matrix, prepared animal dermal matrix similar to human skin, does not cause cross-linking, degradation or denaturation of collagen and other proteins in tissue matrix, decellularized tissue
- the dermis retains the biological integrity of the natural dermal tissue matrix.
- FIG. 1 Tissue section analysis diagram.
- FIG. 1 Tissue section analysis chart.
- A, B, C immunohistochemical staining of type I collagen
- D, E, F type III collagen immunochemical staining sections
- A, D negative dye
- Figure 3 Characteristic map of anti-collagenase hydrolysis of acellular tissue matrix after terminal gamma radiation sterilization.
- Figure 4 HE staining of host cell growth and neovascularization two weeks after subcutaneous implantation of acellular tissue matrix into rats. detailed description
- Example 1 Preparation and performance test of animal acellular tissue-based shield material
- Fresh pigskins were collected from pigs that had just been slaughtered and kept in a refrigerator at 4 degrees Celsius. After mechanical plucking, the pig skin is layered to a thickness of about 1.0 mm and stored frozen at minus 20 degrees Celsius.
- the washed pig's dermis is soaked in a saline solution containing 100 mg of gentamicin per liter, and 2.0 millimoles of calcium chloride, 2.0 millimoles of magnesium chloride and 150 units of neutral dispase per liter are added to the solution. Treated at 37 degrees Celsius for 24 hours.
- the dermis was washed with 0.5% polyethylene glycol octyl phenyl ether solution for 16 hours. After decellularization, rinse with physiological saline twice for 120 minutes each time.
- the solution was sterilized and virus-inactivated for 2 hours with a solution containing 0.02% hydrogen peroxide, 0.15% acetic acid and 0.10% peroxyacetic acid.
- Tissue section analysis showed that the cellular components (such as DNA) and the alpha-1,3 galactose residue in the matrix were removed cleanly, see Figure 1.
- Immunochemical staining analysis of type I and type III collagen also showed that the treatment process did not damage collagen in the dermal matrix, as shown in Figure 2.
- Example 2 Determination of suitable conditions for cleaning and disinfecting the dermis
- Fresh dermis was collected from pigs and fresh porcine dermis was treated at 37 ° C and sodium hydroxide solutions with pH 10.6, 11.5 and 11.8, respectively. 4 liters of sodium hydroxide solution per kg of pig skin, using phosphate buffer as a control. After 24 hours, colony forming units per ml of solution were determined.
- Fresh pigskins were collected from pigs that had just been slaughtered and kept in a refrigerator at 4 degrees Celsius. After mechanical plucking, the pigskins were layered to a thickness of about 1.0 mm.
- the 1.0 mm thick pig dermis was temporarily stored in a minus 80 ° C. freezer after collection and washing (see Example 1).
- the treated dermal matrix was stored in a sterile physiological saline solution containing 12% glycerol, and the bacteria were killed with 25 kGy of gamma rays.
- the method of the present invention improves the flexibility, drape and wound surface integration properties of the tissue matrix.
- Tissue section analysis showed that the ⁇ -1,3 galactose residue antigen in the produced tissue matrix was cleanly removed, stained negative, and free of antigen expression.
- the elastin content was determined by Fastin staining.
- the acellular tissue matrix is resistant to collagenase hydrolysis and can be used to study the stability of collagen in the decellularized tissue matrix prepared by the present invention after terminal gamma ray radiation sterilization.
- the decellularized tissue matrix was prepared by placing it in a solution of 5 collagenase units per cc of trishydroxyl aminoguanidine-hydrochloric acid (10 mM, pH 7.5) and culturing at 37 ° C for up to 64 hours.
- the results show that the performance of the anti-collagenase hydrolysis of the acellular tissue matrix prepared by the method of the present invention after terminal gamma-ray irradiation sterilization is not changed as compared with the untreated porcine dermal material, as specifically shown in Fig. 3.
- the recellularization characteristics of the acellular tissue matrix prepared by the method of the present invention were subjected to animal evaluation experiments using rats (Rattus norvegicus Lewis). Rats ((8 cases) after anesthesia, shaved the back hair with electric scissors, wiped the surgical site with 70% alcohol, cut a separate incision on the back and left and left and right, forming a small pocket, sized to accommodate 1 X 1 cm
- the sample ( ⁇ 1 mm thick) is suitable.
- the tissue matrix sample is implanted subcutaneously. After the operation, if the rat shows signs of pain, the pain is relieved with buprenorphine (0.05 mg/kg).
- the rats are sacrificed two weeks later.
- the implanted tissue matrix material was removed and fixed with 10% neutral formalin solution. The tissue entry method was used to observe the rat host cell entry and blood vessel growth. The results showed that a large number of host cells grew into the tissue within two weeks.
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US14/914,283 US10426868B2 (en) | 2013-08-26 | 2014-05-29 | Method for preparing an animal decellularized tissue matrix material and a decellularized tissue matrix material prepared thereby |
PL14840537T PL3040088T3 (pl) | 2013-08-26 | 2014-05-29 | Sposób otrzymywania zwierzęcego poddanego decelularyzacji materiału macierzy tkankowej i poddany decelularyzacji materiał macierzy tkankowej otrzymany tym sposobem |
EP14840537.6A EP3040088B1 (en) | 2013-08-26 | 2014-05-29 | Method for preparing an animal decellularized tissue matrix material and a decellularized tissue matrix material prepared thereby |
ES14840537T ES2721652T3 (es) | 2013-08-26 | 2014-05-29 | Método para preparar un material de matriz de tejido descelularizado animal y un material de matriz de tejido descelularizado preparado mediante el mismo |
JP2016537093A JP6171101B2 (ja) | 2013-08-26 | 2014-05-29 | 動物脱細胞化組織マトリックス材料を製造するための方法及びその製造された組織マトリックス材料 |
US16/545,338 US11207447B2 (en) | 2013-08-26 | 2019-08-20 | Method for preparing an animal decellularized tissue matrix material and a decellularized tissue matrix material prepared thereby |
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CN201310376619.8A CN103432627B (zh) | 2013-08-26 | 2013-08-26 | 一种制备动物脱细胞组织基质材料的方法及其制备的组织基质材料 |
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US16/545,338 Continuation-In-Part US11207447B2 (en) | 2013-08-26 | 2019-08-20 | Method for preparing an animal decellularized tissue matrix material and a decellularized tissue matrix material prepared thereby |
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CN103432627B (zh) | 2013-08-26 | 2015-03-25 | 北京瑞健高科生物科技有限公司 | 一种制备动物脱细胞组织基质材料的方法及其制备的组织基质材料 |
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US11207447B2 (en) | 2021-12-28 |
US20190374679A1 (en) | 2019-12-12 |
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EP3040088A1 (en) | 2016-07-06 |
US10426868B2 (en) | 2019-10-01 |
EP3040088A4 (en) | 2017-04-12 |
ES2721652T3 (es) | 2019-08-02 |
PT3040088T (pt) | 2019-05-27 |
CN103432627B (zh) | 2015-03-25 |
US20160199540A1 (en) | 2016-07-14 |
CN103432627A (zh) | 2013-12-11 |
JP2016533823A (ja) | 2016-11-04 |
PL3040088T3 (pl) | 2019-07-31 |
JP6171101B2 (ja) | 2017-07-26 |
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