The present invention relates to a method for preparing cell-laden gellan gum-collagen interpenetrating hydrogel using 3D-bioprinter and a 3D printed hydrogel obtainable thereof, particularly for use in the wound treatment.

The present invention relates to the manufacturing gelatin fibers comprising the steps of: (a) preparing a two-phase composition as defined in the claims, (b) spinning the lower phase of said composition, (c) stretching the obtained fiber and (d) optional finishing steps; to new gelatin fibers and to the use thereof.

The present invention relates to nanoprocessing and heterostructuring of silk. It has been shown that few-cycle femtosecond pulses are ideal for controlled nanoprocessing and heterostructuring of silk in air. Two qualitatively different responses, ablation and bulging, were observed for high and low laser fluence, respectively. Using this approach, new classes of silk-based functional topological microstructures and heterostructures which can be optically propelled in air as well as on fluids remotely with good control have been fabricated.

In one aspect, a method includes providing support material within which the structure is fabricated, depositing, into the support material, structure material to form the fabricated structure, and removing the support material to release the fabricated structure from the support material. The provided support material is stationary at an applied stress level below a threshold stress level and flows at an applied stress level at or above the threshold stress level during fabrication of the structure. The provided support material is configured to mechanically support at least a portion of the structure and to prevent deformation of the structure during the fabrication of the structure. The deposited structure material is suspended in the support material at a location where the structure material is deposited. The structure material comprises a fluid that transitions to a solid or semi-solid state after deposition of the structure material.

The present invention provides silk photonic crystals that can be used to enhance light-induced effects. Also disclosed are biocompatible, functionalized, all-protein inverse opals and related methods.

The present invention provides a microneedle patch of which continuous production is possible by a rotary method and in which a front end thereof is composed of hyaluronic acid, and a manufacturing method and a manufacturing device suitable for continuous production of the same.

The microneedle patch according to the present invention is one of which a myriad of needle-shaped parts composed of hyaluronic acid are pressed to be attached to a surface of an adhesive layer 4 laminated on a substrate 2, one of which part of the hyaluronic acid layer 8 which is coated on the surface of the adhesive layer 4 is formed into a needle-shaped part 6 so as to be pressed to be attached thereto, or one of which the hyaluronic acid layer 8 is laminated on the substrate 2 composed of a thin film and then pressed so as to be arranged into a myriad of needle-shaped parts 6. The microneedle patch is continuously manufactured by a method in which the adhesive layer 4 is coated on a substrate 2 by primary gravure coating followed by drying, and then an aqueous hyaluronic acid solution is coated by secondary gravure coating and pressed so as to form a needle-shaped part 6, or in which the hyaluronic acid layer 8 is coated on the substrate 2 and pressed so that part of the hyaluronic acid layer 8 is formed into a needle-shaped part 6. A manufacturing device which includes a first coating part 20 that coats the substrate 2 with an adhesive layer 4 or a hyaluronic acid layer 8, and a second coating part 30 including needle-forming rollers 33 and pressure rollers 35 that press the first drying part 26 and the substrate 2 so as to form a needle-shaped part 6, by a rotary method, is also included.

Systems, apparatus and methods for producing objects with cryogenic 3D printing with controllable micro and macrostructure with potential applications in tissue engineering, drug delivery, and the food industry. The technology can produce complex structures with controlled morphology when the printed 3D object is immersed in a liquid coolant, whose upper surface is maintained at the same level as the highest deposited layer of the object. This ensures that the computer-controlled process of freezing is controlled precisely and already printed frozen layers remain at a constant temperature. The technology controls the temperature, flow rate and volume of the printed fluid emitted by the dispenser that has X-Y positional translation and conditions at the interface between the dispenser and coolant surface. The technology can also control the temperature of the pool of liquid coolant and the vertical position of the printing surface and pool of coolant liquid.

The present invention overcomes all the above drawbacks and provides a versatile method for the fabrication of multilayer hollow tubes that uses a layer-by-layer rod dipping approach using different biomaterials. The device enables fine control over fabrication parameters, such as ascending/descending speeds, rod rotational velocity, and crosslinking or polymerization time. All these technologies allows the generation of more complex multilayer hollow tubes such as vessel-like structures, urethral grafting, prostate grafting and the like.

Stents and methods for producing stents are provided. The stent includes a polymeric substrate comprised of 10-50% (w/w) of alginate and 45-85% (w/w) of gelatine and further includes a polymeric biodegradable resin for coating said polymeric substrate. The stent can also include a contrast agent. The stent can further include a crosslinking agent. The method for producing the stent includes dissolving the alginate and gelatine in water and stirring to obtain a polymeric substrate. The method also includes adding a crosslinking agent to the substrate, injecting the substrate into a mold to obtain the stent, placing the stent in a first alcohol solution, and placing the stent in a crosslinking agent solution. The method further includes placing the stent in a second alcohol solution, and a series of interchanging drying and immersing steps.

The present disclosure provides methods and compositions for directed to synthetic block copolymer proteins, expression constructs for their secretion, recombinant microorganisms for their production, and synthetic fibers (including advantageously, microfibers) comprising these proteins that recapitulate many properties of natural silk. The recombinant microorganisms can be used for the commercial production of silk-like fibers.