Abstract:
The present disclosure relates to fabricating sacrificial microfiber templates from any biocompatible and resorbable materials depending on the time needed for dissolving the microfiber template to free the endothelial tube with open lumen. Microfiber networks with distinct patterns and defined diameters initially serve as a template to support the growth of vascular cells (endothelial cells or their progenitor cells, or combined with mural cells such as pericytes) and then dissolve to form an empty endothelium lumen. The incorporation of sacrificial microfiber networks encapsulated with vascular cells into 3D cell-rich constructs allows for the creation of various vascularized tissues.
Abstract:
In accordance with the method of the present invention, 3D tissue-derived scaffolding materials are made in various formats, including but not limited to hydrogel, sponge, fibers, microspheres, and films, all of which function to better preserve natural extracellular matrix molecules and to mimic the natural tissue environment, thereby effectively guiding tissue regeneration. The method involves incorporating a homogenized tissue-derived suspension into a polymeric solution of synthetic, natural, or hybrid polymers to prepare tissue-derived scaffolds in the aforementioned formats. Such tissue-derived scaffolds and scaffolding materials have a variety of utilities, including: the creation of 3D tissue models such as skin, bone, liver, pancreas, lung, and so on; facilitation of studies on cell-matrix interactions; and the fabrication of implantable scaffolding materials for guided tissue formation in vivo. The tissue-derived scaffolds and scaffolding materials made in accordance with the present invention also provide the opportunity to correlate the functions of extracellular matrix with tissue regeneration and cancer metastasis, for example.
Abstract:
An endosseous dental implant for guided regeneration of gingival tissue onto the implant and method of producing the same is prepared by coating a region of the implant with biocompatible, random or aligned microfibers or nanofibers to which gingival epithelial and connective tissue cells may become attached. The fibers may be degradable or nondegradable. The extracellular matrix of new connective tissue forms and connects to the implant surface, guided by the nanofibers or microfibers. The coated implant prevents bacterial biofilm formation, which can cause detrimental resorption of crestal bone and lead to implant failure. The implant surface supports improved tissue bonding and provides a cost-effective approach to coating the dental implant surface with biomimetic fibers to enhance gingival or other tissue regeneration directly onto the implant surface.
Abstract:
The present invention relates generally to the manufacture of conductive scaffolds of micro and/or nanofibers with the help of different printing techniques (e.g., near-field electrostatic printing, inkjet printing), such scaffolds enabling the formation of two-dimensional (2D) or three-dimensional (3D) neural networks to mimic the native counterparts. Applications of such patterned conductive scaffolds include, but are not limited to, an engineered conduit for guiding the differentiation and outgrowth of neural cells in peripheral nerve damage or in large-volume spinal cord injury under the electrical stimulation. Meanwhile, the scaffolds could also locally deliver various biomolecules in conjunction with electrical stimulation for facilitated nervous system regeneration (FIG. 1).
Abstract:
The described invention provides an ex vivo dynamic multiple myeloma (MM) cancer niche contained in a microfluidic device. The dynamic MM cancer niche includes (a) a three-dimensional tissue construct containing a dynamic ex vivo bone marrow (BM) niche, which contains a mineralized bone-like tissue containing viable osteoblasts self-organized into cohesive multiple cell layers and an extracellular matrix secreted by the viable adherent osteoblasts; and a microenvironment dynamically perfused by nutrients and dissolved gas molecules; and (b) human myeloma cells seeded from a biospecimen composition comprising mononuclear cells and the multiple myeloma cells. The human myeloma cells are in contact with osteoblasts of the BM niche, and the viability of the human myeloma cells is maintained by the MM cancer niche.
Abstract:
The described invention provides an ex vivo dynamic multiple myeloma (MM) cancer niche contained in a microfluidic device. The dynamic MM cancer niche includes (a) a three-dimensional tissue construct containing a dynamic ex vivo bone marrow (BM) niche, which contains a mineralized bone-like tissue containing viable osteoblasts self-organized into cohesive multiple cell layers and an extracellular matrix secreted by the viable adherent osteoblasts; and a microenvironment dynamically perfused by nutrients and dissolved gas molecules; and (b) human myeloma cells seeded from a biospecimen composition comprising mononuclear cells and the multiple myeloma cells. The human myeloma cells are in contact with osteoblasts of the BM niche, and the viability of the human myeloma cells is maintained by the MM cancer niche.
Abstract:
3D native tissue-derived scaffolding materials are made in various formats, including but not limited to hydrogel, sponge, fibers, microspheres, and films, all of which function to better preserve natural extracellular matrix molecules and to recapitulate the natural tissue environment, thereby effectively guiding tissue regeneration. Tissue-derived scaffolds are prepared by incorporating a homogenized tissue-derived suspension into a polymeric solution of synthetic, natural, or hybrid polymers. Such tissue-derived scaffolds and scaffolding materials have a variety of utilities, including: the creation of 3D tissue models such as skin, bone, liver, pancreas, lung, and so on; facilitation of studies on cell-matrix interactions; and the fabrication of implantable scaffolding materials for guided tissue formation in vivo. The tissue-derived scaffolds and scaffolding materials also provide the opportunity to correlate the functions of extracellular matrix with tissue regeneration and cancer metastasis, for example.
Abstract:
A method for fabricating a patterned fibrous matrix includes providing a printer adapted to use an etching solvent as an ink; providing to the printer a fibrous matrix to use as a printing medium; providing to the printer a pattern for printing on the fibrous matrix; printing by the printer the pattern on the fibrous matrix; and receiving from the printer the patterned fibrous matrix with the pattern etched thereon.
Abstract:
A method for fabricating a patterned fibrous matrix includes providing a printer adapted to use an etching solvent as an ink; providing to the printer a fibrous matrix to use as a printing medium; providing to the printer a pattern for printing on the fibrous matrix; printing by the printer the pattern on the fibrous matrix; and receiving from the printer the patterned fibrous matrix with the pattern etched thereon.
Abstract:
In accordance with the method of the present invention, 3D tissue-derived scaffolding materials are made in various formats, including but not limited to hydrogel, sponge, fibers, microspheres, and films, all of which function to better preserve natural extracellular matrix molecules and to mimic the natural tissue environment, thereby effectively guiding tissue regeneration. The method involves incorporating a homogenized tissue-derived suspension into a polymeric solution of synthetic, natural, or hybrid polymers to prepare tissue-derived scaffolds in the aforementioned formats. Such tissue-derived scaffolds and scaffolding materials have a variety of utilities, including: the creation of 3D tissue models such as skin, bone, liver, pancreas, lung, and so on; facilitation of studies on cell-matrix interactions; and the fabrication of implantable scaffolding materials for guided tissue formation in vivo. The tissue-derived scaffolds and scaffolding materials made in accordance with the present invention also provide the opportunity to correlate the functions of extracellular matrix with tissue regeneration and cancer metastasis, for example.