Tissue fillers derived from decellularized tissues are provided. The tissue fillers can include acellular tissue matrices that have reduced inflammatory responses when implanted in a body. Also provided are methods of making and therapeutic uses for the tissue fillers.

A process and system provides for atraumatic preparation of morselized Tissue Particles (TP)s, such as Full Thickness Skin Graft Particles (FTSGPs), cartilage particles and other organ tissue particles, in a liquid medium. The resultant tissue product may be a suspension of Tissue Particles in an aqueous solution and containing highly viable cells and may be rapidly prepared at bedside or in the operating room and conveniently delivered to a patient through a syringe or similar applicator. The morselized Tissues Particles may be used for surgical applications including wound healing, cosmetic surgery, and orthopedic cartilage repairs.

Disclosed herein are compositions and methods to decellularize an isolated organ or portion thereof. Also disclosed herein are compositions and methods for treatment of disease utilizing a decellularized or recellularized organ. Also disclosed herein are methods of improving decellularization and/or recellularization of an isolated organ or portion thereof.

Structures and methods for tissue engineering include a multicellular body including a plurality of living cells. A plurality of multicellular bodies can be arranged in a pattern and allowed to fuse to form an engineered tissue. The arrangement can include filler bodies including a biocompatible material that resists migration and ingrowth of cells from the multicellular bodies and that is resistant to adherence of cells to it. Three-dimensional constructs can be assembled by printing or otherwise stacking the multicellular bodies and filler bodies such that there is direct contact between adjoining multicellular bodies, suitably along a contact area that has a substantial length. The direct contact between the multicellular bodies promotes efficient and reliable fusion. The increased contact area between adjoining multicellular bodies also promotes efficient and reliable fusion. Methods of producing multicellular bodies having characteristics that facilitate assembly of the three-dimensional constructs are also provided.

The present invention provides a valve material having synergistic anti-coagulation and anti-calcification functions and a preparation method therefor. The preparation method comprises the following steps: performing glutaraldehyde cross-linking treatment on an animal-derived biological valve material; immersing the treated valve material in a blocking solution containing an amine compound for 0.5-6 h, thereby blocking the remaining aldehyde groups after glutaraldehyde cross-linking; then placing the valve material into a reaction solution containing an anticoagulant and a cross-linking agent, and performing cross-linking treatment for 6-24 h at 4° C.-37° C.; and finally washing and obtaining the valve material, and storing the valve material in a mixed solvent of glutaraldehyde or isopropyl alcohol/glycerol. The method can effectively solve the problem of calcification and thrombosis caused by residual aldehyde groups in a valve material prepared by the existing method. The valve material prepared by the present method can be used as a valve material required for aortic valve, pulmonary valve, venous valve, mitral valve and tricuspid valve replacement.

A method for producing xenogeneic bone graft, which is a material for use in bone tissue therapy, is provided. The method includes the steps of isolating the cancellous bones from cartilage and cortical bone by fragmenting them into pieces, washing the bone fragments with purified water to partially remove the organic phases and boiling them with purified water, contacting the bone fragments with a solvent for further removal/isolation of the organic phase, washing the bone fragments to remove the solvents used and other possible residues, subjecting them to a hydrothermal and/or solvothermal treatment with a solvent at a pressure of more than 1 atm and a temperature in the range of 100° C. to 300° C., after which washing them with purified water, and drying the cancellous bone fragments, for example, at a temperature in the range of 50° C. to 100° C. to dehydrate them.

Described are medical graft products, systems, and methods for treating fistulae. Certain products of the invention are configured to have portions residing in and around a primary fistula opening, e.g., one occurring in a wall of the alimentary canal. One such product includes a biocompatible graft body which is configured to block at least the primary opening. The graft body includes a capping member, which is configured to contact portions of the alimentary canal wall adjacent to the primary opening, and an elongate plug member extending from the capping member, which is configured to extend into at least a portion of the fistula. In certain embodiments, a graft body component has the capacity to expand or otherwise change form to provide a suitable capping arrangement. Such a component can include a resilient wire frame, e.g., one that is self-expandable or one that requires at least some manipulation in order to expand.

A method is described for the production of hybrid structures formed by the coupling of nanofibrous parts and microfibrous parts made with silk fibroin, possibly hierarchically organized into complex structures comprising more than two of said parts; these hybrid structures are used as implantable biomedical devices with tailored biological, geometrical and structural features, such that they can be adapted to different application requirements in the field of regenerative medicine.

The present disclosure aims to provide a manufacturing method of a cell structure. The manufacturing method comprises producing a coated region in which a culturing surface is coated with a temperature-responsive polymer or a temperature-responsive polymer composition, forming a droplet of a cell suspension in the coated region, and performing cell culturing in the droplet. A surface zeta potential of the coated region is 0 mV to 50 mV.

The present disclosure aims to provide a manufacturing method of a cell structure. The manufacturing method comprises producing a coated region in which a culturing surface is coated with a temperature-responsive polymer or a temperature-responsive polymer composition, forming a droplet of a cell suspension in the coated region, and performing cell culturing in the droplet. A surface zeta potential of the coated region is 0 mV to 50 mV.