KR20160091750A - Member of 3-dimensional cartilage-culture and apparatus of cartilage-culture having the same - Google Patents

Abstract

The present invention relates to a cartilage culture member and a cartilage culture apparatus comprising the same. The cartilage culture member according to the present invention comprises a growth support which is provided to come into contact with one of the perichondria on both sides of a cartilage and is formed of porous hydrogel of at least one material from polyvinyl alcohol (PVA) and polyvinyl acetate (PVA). According to the present invention, the member and apparatus: can culture cartilage, particularly ear cartilage, which can be applied to the treatment of degenerative joint disease and the like by being inserted between perichondrium and cartilage or by being inserted to be adjacent to the perichondrium remaining after the cartilage has been taken; and provide an environment in which stem cells can be grown as cartilage tissues in the human body.

Description

Technical Field [0001] The present invention relates to a three-dimensional cartilage culture member and a cartilage culture apparatus including the three-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartilage culturing member and a cartilage culturing apparatus including the cartilage culturing member. More particularly, the present invention relates to an apparatus for artificially culturing cartilage in a body for autologous cartilage transplantation.

Cartilage is a tissue composed of cartilage cells and a large number of substrates surrounding it, which is a concept corresponding to tibia (or bone tissue), which is a bone composed mainly of calcium. The action of the cartilage is to prevent the friction of the neck as it can be seen in the articular cartilage covering the joint of the joints, but also to maintain the elasticity like the organs and the auricle, or to give resistance to pressure such as the cartilage, . Cartilage is non-nervous, anechoic, and non-invasive, and can not be restored once it is damaged. For example, cartilage in the joints such as the knee, hip and jaw joints may be damaged by abrasion due to shock absorption or degenerative arthritis. In such a case, the damaged cartilage is not restored naturally.

Therefore, when the cartilage is worn or damaged, it is necessary to replace the worn or damaged cartilage by using artificial cartilage member or cartilage collected from the body or artificially cultured cartilage.

However, when artificial cartilage is cultured at the laboratory level, only an artificial growth factor is used for culturing the cartilage, and growth factors to be used are also limited. In the case of growing cartilage in such a circumstance, In most cases, it is inadequate in terms of quality to be applied to the human body, and it has been very difficult to cultivate in three dimensions.

For example, when cartilage cells were separated from the cartilage cells and cultured in vitro, cartilage replacement was performed to a lesser degree than expected cartilage, and thus it was difficult to expect the cartilage to function. In addition, stem cells were cultured and cartilage scaffolds In addition, even in the case of conversion to cartilage, there was a phenomenon that the tissue was not dense in the actual application case and was crushed. That is, conventional cartilage culturing methods at the laboratory level have a problem of very low efficiency compared to high cost.

The present invention provides a cartilage culturing member capable of continuously collecting ear cartilage or costal bone so that stability can be maintained through autologous cell implantation applicable to treatment of degenerative joint disease and the like, and cartilage culturing apparatus including the cartilage culturing member.

In addition, the present invention provides a cartilage culturing member which facilitates introduction of a cartilage formation inducing substance (for example, PRP, blood, stem cell culture fluid, stem cell) and cartilage culturing apparatus including the same.

The present invention also provides a cartilage culturing member capable of stimulating stem cells through continuous cartilage growth factor so that the stem cells can grow into cartilage tissue, and a cartilage culturing apparatus including the cartilage culturing member.

The cartilage culturing member according to the present invention comprises a cartilage supporting member for supporting a cartilage to be inserted into a human body, wherein the cartilage culturing member comprises a porous hydro- And a growth support provided as a gel.

In addition, the growth support may be inserted adjacent to the cartilage membrane remaining between the cartilage and the cartilage or after the cartilage collection.

In addition, the growth support may contain at least one of blood, platelet-rich plasma (PRP), and stem cell culture fluid.

The growth support may further contain stem cells. At this time, the stem cells can be injected with activated differentiation derivatives (precursors) capable of differentiating into cartilage tissue.

Wherein the supply capsule is provided with a body fluid-soluble shell member in which a certain space is formed inside the supply capsule, and the shell member is filled with blood, platelet-rich plasma, stem cells, and stem cell culture fluid And may include at least any one of them.

Further, the supply capsule may be provided in a plurality of types in which the thickness of the shell member is different.

The shell member may also be made of a material selected from the group consisting of Cat gut, Polydioxanone (PDS), Polyglactin, Vicryl, Polyglutamic Acid (PGA), Polylactic acid (PLA ), And Poly (Lactic-co-Glycolic) Acid (PLGA).

The shell member may be made of a non-absorbent material of at least one of polyamide, nylon, polypropylene, polyetheretherketone (PPE), polyester, and polyethylene .

On the other hand, the cartilage culturing apparatus according to the present invention comprises the above-described growth support; A first plate and a second plate provided on both sides of the growth support; And a gap maintaining unit for maintaining a gap between the first plate and the second plate by connecting the gap between the first plate and the second plate.

The first plate and the second plate may have at least one cut-out portion of a penetrating shape.

The first plate and the second plate may be formed of a thermoplastic resin.

The first plate and the second plate may be formed of a cutable synthetic resin material.

The first plate and the second plate may further include a supply part provided adjacent to any one of the first plate and the second plate and supplying a fluid to the space between the first plate and the second plate.

The supply unit may supply at least one of blood, platelet-rich plasma (PRP), stem cells, and stem cell culture fluids.

In addition, each of the pores forming the porous body may have an average diameter of 100 nm to 1200 nm.

The pores may also contain at least one of type 2 collagen, GAGs (Glycosaminoglycans), and calcium alginate.

Also, the pores may have a coating layer containing at least one of type 2 collagen, GAGs (Glycosaminoglycans) and calcium alginate on the inner surface thereof.

Meanwhile, in the physical crosslinking process using the polyvinyl alcohol freeze-thaw method, the method for manufacturing a cartilage culture apparatus according to the present invention comprises the steps of: injecting a bubble generating agent during the physical crosslinking; And irradiating the bubble forming agent with ultrasound to convert into fine bubbles, and extracting the bubbling agent after the physical crosslinking.

On the other hand, the PVA hydrogel porous growth support is used as a support for blood, platelet rich plasma (PRP), fetal bovine serum (FBS), stem cell culture solution, stem cells, type II collagen, GAGs (Glycosaminoglycans) (calcium alginate) in an aqueous solution; And drying the immersed PVA hydrogel porous growth support.

According to the present invention, there is provided a member and apparatus capable of culturing cartilage, particularly ear cartilage or costal bone, which is inserted between a cartilaginous membrane and cartilage or inserted adjacent to a cartilage membrane remaining after being harvested and used for treatment of degenerative joint disease and the like.

In addition, according to the present invention, it is possible to continuously introduce a substance that induces cartilage formation, for example, PRP, blood, stem cell culture solution, stem cell, etc. through a separate supply part or a supply capsule.

The present invention also provides an environment in which stem cells can grow into cartilage tissue in the human body by being inserted into the human body.

In addition, according to the present invention, there is provided an environment in which cartilage having a dense structure can be cultured by providing a growth support that contains substances that induce cartilage formation and can serve as a support for cartilage in culturing cartilage.

Fig. 1 is a schematic view schematically showing a portion where ear cartilage of a human body can be picked up.
2 is a perspective view showing a cartilage culturing member according to an embodiment of the present invention.
FIGS. 3 and 4 are a plan view and a front view, respectively, showing a state of the cartilage culturing member according to FIG. 2;
5 to 7 are schematic views for explaining the insertion position of the cartilage culturing apparatus and the cartilage culturing process.
8 is a perspective view showing a cartilage culturing apparatus including a cartilage culturing member according to an embodiment.
9 and 10 are respectively a plan view and a front view showing a state of the cartilage culturing apparatus according to FIG.
11 is a perspective view showing a frame structure according to an embodiment.
12 and 13 are respectively a plan view and a front view showing the frame structure according to Fig.
14 is a perspective view showing a state of a cartilage culturing apparatus according to another embodiment.
Fig. 15 is a plan view showing the cartilage culturing apparatus according to Fig. 14; Fig.
16 is an incision perspective view showing a cartilage culturing member according to another embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the absence of special definitions or references, the terms used in this description are based on the conditions indicated in the drawings. The same reference numerals denote the same members throughout the embodiments. For the sake of convenience, the thicknesses and dimensions of the structures shown in the drawings may be exaggerated, and they do not mean that the dimensions and the proportions of the structures should be actually set.

A general ear cartilage collecting process will be described with reference to FIG. Fig. 1 is a schematic view schematically showing a portion where ear cartilage of a human body can be picked up.

Self-organizing refers to the tissue that is literally taken from the patient's own body and is the safest and best material to use when using inserts to raise the nose and nose. Since it is its own tissue, there is no fear of side effects such as rejection reaction by foreign substances, and it is easy to heal even if it does not develop inflammation well. However, in order to collect autologous tissue, it is necessary to incise other parts except the surgical site, and there is a limitation in the amount of self-tissue that can be collected.

The autografts used mainly in nose surgery include ear cartilage, nasal septal cartilage, and costal bone. The double ear cartilage is made of elastic cartilage that is histologically identical to the wing cartilage at the end of the nose. It has a curved shape and is suitable for reinforcing the shape of the nose tip. As shown in FIG. 1, there is a certain region (CR) in the ear (E) of the human body in which cartilage can be collected. The cartilage can take the ear cartilage in a curved shape from the front or back of the region CR. The shape and size of the ear cartilage are somewhat different for each individual.

On the other hand, as described above, there is a problem that since the size and amount of the ear cartilage are limited, it is difficult to collect again after collecting the cartilage once. The cartilage culturing apparatus according to the present invention relates to a member for inserting a cartilage into a human body after culturing the cartilage and culturing the cartilage again, and an apparatus including the same. The ear cartilage cultured through the cartilage culturing member and apparatus according to the present invention can be used for treatment of degenerative joint disease in addition to nose plasty. Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 2 is a perspective view of a cartilage culturing member according to an embodiment of the present invention, and FIGS. 3 and 4 are a plan view and a front view, respectively, showing a cartilage culturing member according to FIG.

The cartilage culturing member 200 functions as a cartilage growth support during culturing cartilage, and is formed in a plate shape corresponding to the shape of the cartilage retrieval area described above. As the cartilage culture member 200, a porous biocompatible synthetic resin may be used, and polyvinyl alcohol (PVA) or polyvinyl acetate (PVAc) may be preferably used.

Polyvinyl alcohol (PVA) is a hydrophilic polymer synthetic resin obtained through hydrolysis of polyvinyl acetate (PVAc). Cross-linking of PVA is achieved through chemical and physical methods. Chemical cross-linking is the formation of a gel by combining a hydroxyl group and an aldehyde-based solution of PVA with an acidic cross-linking agent. A typical method of physical crosslinking is freeze-thawing. The hydrogel prepared by the freeze-thaw process has little toxicity and does not contain any impurities, and contains about 80 to 90% of water. Also, since it does not use a crosslinking agent, it can be used as an attractive biomedical hydrogel.

Meanwhile, in the cross-linking process, a porous material may be formed by forming a pore by adding a pore generating agent and then extracting a pore forming agent after completion of crosslinking. In this process, it is possible to further add a step of irradiating ultrasonic waves before completion of crosslinking.

The pore formed by the pore generating agent has an average diameter of 1500 nm or more. By irradiating ultrasonic waves to the pores formed at this time, a finer pore can be obtained. When the pore generator is extracted, the pores formed in the PVA hydrogel become finer in size.

At this time, examples of the bubble generating agent may include freon, hydrogen fluoride chlorofluorocarbon (HCFC), cyclopentane, and the like.

Since the growth support made of PVA as in the present embodiment maintains a certain shape, there is no fear of absorption loss in the human body and high biocompatibility, and there is no possibility of necrosis of the biotissue.

The cartilage culturing member 200 also contains stem cell and / or cartilage culture inducing / promoting substances to create an environment favorable for culturing the cartilage, and functions as a support for supporting the growth of cartilage at the time of cartilage growth .

Chondrocyte culture inducing / promoting substances may include blood, platelet-rich plasma (PRP), fetal bovine serum (FBS), etc., and may further include stem cell culture medium and additional stem cells .

Platelet-rich plasma contains proteins, polypeptides, and hormones, which include various wound healing growth factors. Specifically, PDGF is one of a group of polypeptides having the ability to promote cell proliferation and promotes the growth of fibroblasts and glia. Platelet-derived vitreous cells, such as TGF-beta, can inhibit the growth of epithelial cells and promote cell differentiation. (FGF), epidermal growth factor (EGF), endothelial growth factors (ECGF), and insulin-like growth factors (IGF-1, IGF-2).

Hormones show different effects on each cell. Insulin may stimulate cell proliferation by promoting uptake of sugars and amino acids into cells, and may also have an effect by the activity of the IGF-1 receptor. Growth factors such as IGF-1 and IGF-2 not only bind insulin receptors, but also have their own unique receptors that insulin can bind, so that IGF-2 promotes cellular sugar uptake. Growth hormone, especially in fetal serum, is associated with somatomedins (IGF), which can promote cell proliferation.

Thus, the cartilage culture inducing / promoting substances contained in the cartilage culturing member 200 induce and promote cartilage culturing in the cartilage culturing member.

On the other hand, in addition to such cartilage culture inducing / promoting materials, the growth support may further include materials for directly forming cartilage cells. For example, the supernatural bone is composed of a large amount of structural elements and amorphous elements. The structural elements include collagen fibers, especially type II collagen. A gel-like substrate formed by proteoglycans containing a large amount of water exists in a form that is close to collagen fibers. Proteoglycans are believed to play an important role in the transport of water and electrolytes in the matrix in association with cations, allowing nutrients, metabolites and regulators to diffuse from the blood vessels into cartilage cells.

The formation of cartilage in this manner may further include a structural element, that is, a component capable of supporting a growth support formed of PVA serving as a support, such as a backbone, or materials constituting cartilage formation. For example, these materials may further include substances such as type 2 collagen, GAGs (Glycosaminoglycans), calcium alginate, and the like.

These materials can be formed by forming a coating layer on the inner side of the above-described pores when the average diameter of the inner pores of the growth support is not in the range of 100 nm to 1200 nm, and when the average diameter of the pores is in the range of 100 nm to 1200 nm .

For example, a PVA hydrogel type growth support on which a pore is formed is immersed in an aqueous solution of the above-described cartilage culture induction / promotion substances and / or substances such as type 2 collagen, GAGs and calcium alginate for a certain period of time, Thereby allowing such a substance to be contained in the pore or forming a coating layer of such substances on the inner surface of the pore.

The insertion process of the cartilage culture member will be described with reference to FIGS. 5 to 7. FIG. 5 to 7 are schematic views for explaining the insertion position of the cartilage culturing member and the cartilage culturing process.

The ear cartilage is present in the form of a cartilage (EP) surrounded by the middle cartilage (EC) on both sides. The cartilage grows or becomes thicker when cartilage cells adjacent to the cartilage (EP) ). ≪ / RTI >

If your ear cartilage is severely folded like a wrestler or a Judo player, the cartilage covering the cartilage and the cartilage are separated, and the blood is drawn into the cartilage and the hematoma is formed. Hematoma is slowly absorbed, but cartilage grows to some extent in cartilage and cartilage during that period. If there are many hematomas, absorption will be slower and more cartilage will be formed. If this happens repeatedly, the cartilage grows more and more, and eventually becomes a wrestler's ear or cauliflower's ear deformity.

As a preliminary step for using the cartilage culturing apparatus according to the present invention, when the cartilage (EC) is collected, any one of the cartilage membranes (EP) on both sides of the cartilage (EC) is left. That is, as shown in FIG. 6, only the portion (TOR) including the cartilage (EC) and the cartilage membrane (EP) on one side is collected. However, harvesting of cartilage is not an essential condition for establishing the present invention. In other words, the cartilage culture apparatus can be inserted between the cartilaginous membrane (EP) and the cartilage (EC) in an open state. In this case, the series of processes described below can be performed in the same manner.

Then, as shown in FIG. 10, the cartilage culture member 200 according to the present invention is inserted into the region TOR, and the blood, platelet-rich plasma (PRP) (FBS), stem cell culture medium, and stem cell to induce an environment favorable for culturing the cartilage, and if necessary, the stem cells can be injected to directly differentiate into cartilage tissue . The cartilage has no blood vessels and is nourished by the diffusion from the cartilage with blood vessels. However, when the cartilage culture inducing / promoting material is supplied, sufficient nutrition can be supplied to increase the growth rate of cartilage.

Stem cells are likely to differentiate into cartilage tissue in the ear of the human body, but it is also possible that they are injected with activated differentiation derivatives (precursors) capable of differentiating into cartilage tissue for clarification.

The cartilage can grow more rapidly using the growth support 200 as a support. The cartilage grows from the portion of the growth support 200 except for the pores, and then grows in such a manner as to fill each pore. Therefore, the size of the pore can be used as a factor to control the timing and compactness of the chondrocyte culture. For example, when the pore size is small, the initial cartilage grows rapidly and the cartilage tissue grown for a certain period of time is densely formed as compared with the case where the pore size is large. On the other hand, when the pore size is large, after the cartilage is grown into the pore, the final cartilage tissue is formed more densely than when the pore size is small. Thus, the pore size can be used as a factor related to the growth rate of the cartilage and the density of the final cartilage. Therefore, considering the initial growth rate and the density of the cartilage, it is preferable that the pore size is formed in the range of 100 nm to 1200 nm. Therefore, the cartilage grown in the body using the growth support 200 according to the present embodiment has a dense structure as compared with artificially cultured cartilage in vitro.

A cartilage culturing apparatus according to an embodiment will be described with reference to FIGS. 8 to 13. FIG. FIG. 8 is a perspective view showing a cartilage culturing apparatus including a cartilage culturing member according to an embodiment, and FIGS. 9 and 10 are a plan view and a front view, respectively, showing a cartilage culturing apparatus according to FIG. 11 is a perspective view showing a frame structure according to an embodiment, and FIGS. 12 and 13 are a plan view and a front view, respectively, showing a frame structure according to FIG.

The cartilage culturing apparatus 100 according to the present embodiment includes a first plate 110 and a second plate 111 covering the cartilage culturing member 200. As shown in FIGS. 8 to 10, the first plate 110 and the second plate 111 are provided with a cartilage culture member 200 between them. It is possible to prevent breakage.

Specifically, as shown in FIGS. 11 to 13, the first plate 110 and the second plate 111 are formed of plates having a shape corresponding to the shape of the cartilage culturing member described above. In addition, the first plate 110 and the second plate 111 may be formed in a lattice shape by forming a plurality of lancing patterns S on the first plate 110 and the second plate 111.

The gap holding part 120 supports the first plate 110 and the second plate 111 to maintain a gap therebetween.

A cartilage culturing apparatus according to another embodiment will be described with reference to Figs. 14 and 15. Fig. FIG. 14 is a perspective view showing a state of a cartilage culturing apparatus according to another embodiment, and FIG. 15 is a plan view showing a cartilage culturing apparatus according to FIG.

The cartilage culturing apparatus 100b according to the present embodiment includes a supply unit 300. [ The supply part 300 includes a substance capable of inducing or promoting cartilage culture inside and continuously supplies the cartilage culture inducing / promoting material into a space between the first plate 110 and the second plate 111 .

As described above, the cartilage culture inducing / promoting material may be blood, platelet-rich plasma (PRP), fetal bovine serum (FBS) or the like, and if necessary, .

A cartilage culturing member according to another embodiment will be described with reference to FIG. 16 is a partial cutaway perspective view showing a state of a cartilage culturing member according to another embodiment.

As shown in FIG. 16, the cartilage culturing member according to the present embodiment may include supply capsules 290a and 290b inside.

Feed capsules 290a and 290b include a shell member 291 that defines a constant space 292 therein. Promoting material such as blood, platelet-rich plasma (PRP), fetal bovine serum (FBS), stem cell culture solution and stem cells described above is introduced into the space 291 inside the shell member 291 Respectively.

The shell member 291 is made of Cat gut, Polydioxanone (PDS), Polyglactin, Vicryl, Polyglutamic Acid (PGA) or the like in consideration of absorption or biocompatibility. , Polylactic acid (PLA) and poly (lactide-co-glycolic acid) (PLGA), polyamide and nylon, polypropylene and prolene, PPE), polyester (polyester), and non-absorbent material of polyethylene (polyetylene). However, even in the case of a non-absorbent material, it is decomposed after several days, and is absorbed into the body, so there is no need for a separate removal process.

In this way, the shell member 291 is melted and absorbed in the body after a predetermined time, in which case the cartilage culture inducing / promoting substance contained therein is exposed. Chondrocyte culture inducing / promoting substances exposed to the body contribute to promote the culturing of cartilage.

On the other hand, the shell member 291 can determine the melting time in the body depending on the thickness and the material. For example, when the thickness is large, the shell member 291 is melted later than the relatively thin shell member 291, and the non-absorbent shell member 291 is melted later than the shell member 291. Thus, by combining the thickness and the material, the chondrocyte culture inducing / promoting substance contained in the feed capsule can be controlled to be sequentially supplied to the body.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. have.

100: cartilage culture device
110: first plate
111: second plate
120:
200: cartilage culture member
290: Supply Capsule

Claims (20)

1. A supporter for culturing a cartilage to be inserted into a human body,
And a growth support provided to be in contact with one surface of a cartilage membrane in contact with the cartilage, the cartilage comprising a porous hydrogel made of at least one of polyvinyl alcohol (PVA) and polyvinyl acetate (PVAc). The method according to claim 1,
Wherein the growth support is inserted between the cartilage and the cartilage or adjacent to the cartilage remaining after cartilage harvesting. The method according to claim 1,
Wherein the growth support comprises at least one of blood, platelet-rich plasma (PRP), and stem cell culture fluid. The method of claim 3,
Wherein the growth support further comprises stem cells. 5. The method of claim 4,
Wherein the stem cell is injected in an activated state as a differentiation derivative (precursor) capable of differentiating into cartilage tissue. The method according to claim 1,
A supply capsule in the growth support,
Wherein the supply capsule has a body fluid-soluble shell member in which a certain space portion is formed inside,
Wherein the shell member comprises at least one of blood, platelet-rich plasma, stem cells, and stem cell culture liquid inside. The method according to claim 6,
Wherein the supply capsule is provided in a plurality of types with different thicknesses of the shell members. The method according to claim 6,
The shell member may be made of a material selected from the group consisting of Cat gut, Polydioxanone (PDS), Polyglactin, Vicryl, Polyglutamic Acid (PGA), Polylactic acid (PLA) , And Poly (Lactic-co-Glycolic) Acid (PLGA). The method according to claim 6,
The shell member may be formed of a non-absorbent material of at least one of polyamide, nylon, polypropylene, prolene, polyphenylene ether (PPE), polyester, and polyethylene A cartilage culture member. 10. A cartilage culturing member according to any one of claims 1 to 9,
A first plate and a second plate provided on both sides of the growth support;
And a gap maintaining unit for maintaining a gap between the first plate and the second plate by connecting the gap between the first plate and the second plate. 11. The method of claim 10,
Wherein the first plate and the second plate have at least one cut-out portion formed in a through-shape. 11. The method of claim 10,
Wherein the first plate and the second plate are formed of a thermoplastic resin. 11. The method of claim 10,
Wherein the second plate and the second plate are made of a cutable synthetic resin material. 11. The method of claim 10,
Further comprising a supply part provided adjacent to any one of the first plate and the second plate and supplying a fluid to a space side between the first plate and the second plate. 15. The method of claim 14,
Wherein the supply unit supplies at least one of blood, platelet-rich plasma (PRP), stem cells, and stem cell culture fluids. The method according to claim 1,
Wherein each of the pores forming the porous body has an average diameter of 100 nm to 1200 nm. 17. The method of claim 16,
Wherein the pores contain at least one of type 2 collagen, GAGs (Glycosaminoglycans), and calcium alginate. 17. The method of claim 16,
Wherein the pores are formed on the inner surface with a coating layer comprising at least one of type 2 collagen, GAGs (Glycosaminoglycans) and calcium alginate. In the physical crosslinking process using the freeze-thaw method of polyvinyl alcohol,
Introducing a bubble generator during the physical crosslinking process; And irradiating ultrasonic waves to the bubble generator to convert the bubble generator into fine bubbles,
And extracting the bubble generator after the physical crosslinking process. The PVA hydrogel porous growth support can be used to treat blood, platelet rich plasma (PRP), fetal bovine serum (FBS), stem cell culture, stem cells, type II collagen, GAGs (Glycosaminoglycans) and calcium alginate ) ≪ / RTI > in an aqueous solution; And
And drying the immersed PVA hydrogel porous growth support.

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