Abstract: Methods are disclosed which combine electrospinning and a sacrificial template, such as with additive manufacturing (AM), to produce fibrous microvascular scaffolds which are biodegradable, porous, and easily handled. In one example, a process for fabricating a fibrous network construct is disclosed. The method includes electrospinning a first layer of fibrous material; printing a micropatterned sacrificial template; transferring the micropatterned sacrificial template onto the electrospun fibers; electrospinning a second layer of fibrous biomaterial onto the micropatterned sacrificial template thereby encapsulating the template and generating a construct with two layers; and removing the sacrificial template, producing a fibrous construct with channels or microstructures formed therein. Also disclosed are fibrous constructs and scaffolds produced by the provided methods.

Abstract: Compositions are provided herein comprising a coacervate of a polycationic polymer, a polyanionic polymer, and platelet-rich plasma and/or serum, or a fraction or concentrate thereof. The composition is useful in wound healing. Compositions also are provided that comprise a hydrogel comprising TIMP-3; and a complex of a polycationic polymer, a polyanionic polymer, FGF-2 and SDF-1? embedded in the hydrogel, which is useful in treating a myocardial infarction.

Abstract: Provided herein are coacervate compositions including cytokines, and methods of making and using the same. The coacervate can be formed by the mixing of an active agent, such as a drug or protein with the polyanion, such as heparin or heparan sulfate, and a custom-made polycation (e.g., PEAD or PELD). The coacervates can be used in the treatment of diseases and disorders where targeted treatment is desired, for example in treatment of cancers.

Abstract: Compositions are provided herein comprising a coacervate of a polycationic polymer, a polyanionic polymer, and platelet-rich plasma and/or serum, or a fraction or concentrate thereof. The composition is useful in wound healing. Compositions also are provided that comprise a hydrogel comprising TIMP-3; and a complex of a polycationic polymer, a polyanionic polymer, FGF-2 and SDF-1? embedded in the hydrogel, which is useful in treating a myocardial infarction.

Abstract: Compositions are provided herein comprising a coacervate of a polycationic polymer, a polyanionic polymer, and platelet-rich plasma and/or serum, or a fraction or concentrate thereof. The composition is useful in wound healing. Compositions also are provided that comprise a hydrogel comprising TIMP-3; and a complex of a polycationic polymer, a polyanionic polymer, FGF-2 and SDF-1? embedded in the hydrogel, which is useful in treating a myocardial infarction.

Abstract: Provided herein are coacervate compositions including cytokines, and methods of making and using the same. The coacervate can be formed by the mixing of an active agent, such as a drug or protein with the polyanion, such as heparin or heparan sulfate, and a custom-made polycation (e.g., PEAD or PELD). The coacervates can be used in the treatment of diseases and disorders where targeted treatment is desired, for example in treatment of cancers.

Abstract: Provided herein are coacervate compositions including cytokines, and methods of making and using the same. The coacervate can be formed by the mixing of an active agent, such as a drug or protein with the polyanion, such as heparin or heparan sulfate, and a custom-made polycation (e.g., PEAD or PELD). The coacervates can be used in the treatment of diseases and disorders where targeted treatment is desired, for example in treatment of cancers.

Abstract: Methods are disclosed which combine electrospinning and a sacrificial template, such as with additive manufacturing (AM), to produce fibrous microvascular scaffolds which are biodegradable, porous, and easily handled. In one example, a process for fabricating a fibrous network construct is disclosed. The method includes electrospinning a first layer of fibrous material; printing a micropatterned sacrificial template; transferring the micropatterned sacrificial template onto the electrospun fibers; electrospinning a second layer of fibrous biomaterial onto the micropatterned sacrificial template thereby encapsulating the template and generating a construct with two layers; and removing the sacrificial template, producing a fibrous construct with channels or microstructures formed therein. Also disclosed are fibrous constructs and scaffolds produced by the provided methods.

Abstract: Methods are disclosed which combine electrospinning and a sacrificial template, such as with additive manufacturing (AM), to produce fibrous microvascular scaffolds which are biodegradable, porous, and easily handled. In one example, a process for fabricating a fibrous network construct is disclosed. The method includes electrospinning a first layer of fibrous material; printing a micropatterned sacrificial template; transferring the micropatterned sacrificial template onto the electrospun fibers; electrospinning a second layer of fibrous biomaterial onto the micropatterned sacrificial template thereby encapsulating the template and generating a construct with two layers; and removing the sacrificial template, producing a fibrous construct with channels or microstructures formed therein. Also disclosed are fibrous constructs and scaffolds produced by the provided methods.

Abstract: Disclosed herein are methods of electrospinning poly(glycerol sebacate) (PGS) which allow stable PGS fibers and fibrous PGS constructs, scaffolds and grafts to be formed. In one example, a disclosed method includes generating PGS fibers by blending PGS prepolymer with a heat resistant synthetic carrier polymer, wherein the blend is electrospun into micro- or nano-fibers, and the PGS prepolymer is cross-linked into PGS with heat without using chemical cross-linkers. In another example, a disclosed method includes electrospinning a PGS and gelatin blend, wherein the PGS and gelatin composition are cross-linked by heat curing without using chemical cross-linkers. In another example, the method includes preparing an electrospinning precursor solution comprising blending PGS prepolymer with poly(lactic-co-glycolic acid) (PLGA) and a chemical cross-linker; electrospinning the prepared blend; and exposing the electrospun blend to an organic solvent to remove the PLGA.

Abstract: Compositions are provided herein comprising a coacervate of a polycationic polymer, a polyanionic polymer, and platelet-rich plasma and/or serum, or a fraction or concentrate thereof. The composition is useful in wound healing. Compositions also are provided that comprise a hydrogel comprising TIMP-3; and a complex of a polycationic polymer, a polyanionic polymer, FGF-2 and SDF-1? embedded in the hydrogel, which is useful in treating a myocardial infarction.

Abstract: Provided herein are coacervate compositions including cytokines, and methods of making and using the same. The coacervate can be formed by the mixing of an active agent, such as a drug or protein with the polyanion, such as heparin or heparan sulfate, and a custom-made polycation (e.g., PEAD or PELD). The coacervates can be used in the treatment of diseases and disorders where targeted treatment is desired, for example in treatment of cancers.

Abstract: Disclosed herein are methods of electrospinning poly(glycerol sebacate) (PGS) which allow stable PGS fibers and fibrous PGS constructs, scaffolds and grafts to be formed. In one example, a disclosed method includes generating PGS fibers by blending PGS prepolymer with a heat resistant synthetic carrier polymer, wherein the blend is electrospun into micro- or nano-fibers, and the PGS prepolymer is cross-linked into PGS with heat without using chemical cross-linkers. In another example, a disclosed method includes electrospinning a PGS and gelatin blend, wherein the PGS and gelatin composition are cross-linked by heat curing without using chemical cross-linkers. In another example, the method includes preparing an electrospinning precursor solution comprising blending PGS prepolymer with poly(lactic-co-glycolic acid) (PLGA) and a chemical cross-linker; electrospinning the prepared blend; and exposing the electrospun blend to an organic solvent to remove the PLGA.

Abstract: Disclosed herein are methods of electrospinning poly(glycerol sebacate) (PGS) which allow stable PGS fibers and fibrous PGS constructs, scaffolds and grafts to be formed. In one example, a disclosed method includes generating PGS fibers by blending PGS prepolymer with a heat resistant synthetic carrier polymer, wherein the blend is electrospun into micro- or nano-fibers, and the PGS prepolymer is cross-linked into PGS with heat without using chemical cross-linkers. In another example, a disclosed method includes electrospinning a PGS and gelatin blend, wherein the PGS and gelatin composition are cross-linked by heat curing without using chemical cross-linkers. In another example, the method includes preparing an electrospinning precursor solution comprising blending PGS prepolymer with poly(lactic-co-glycolic acid) (PLGA) and a chemical cross-linker; electrospinning the prepared blend; and exposing the electrospun blend to an organic solvent to remove the PLGA.

Abstract: Methods are disclosed which combine electrospinning and a sacrificial template, such as with additive manufacturing (AM), to produce fibrous microvascular scaffolds which are biodegradable, porous, and easily handled. In one example, a process for fabricating a fibrous network construct is disclosed. The method includes electrospinning a first layer of fibrous material; printing a micropatterned sacrificial template; transferring the micropatterned sacrificial template onto the electrospun fibers; electrospinning a second layer of fibrous biomaterial onto the micropatterned sacrificial template thereby encapsulating the template and generating a construct with two layers; and removing the sacrificial template, producing a fibrous construct with channels or microstructures formed therein. Also disclosed are fibrous constructs and scaffolds produced by the provided methods.

Abstract: Disclosed herein are methods of electrospinning poly(glycerol sebacate) (PGS) which allow stable PGS fibers and fibrous PGS constructs, scaffolds and grafts to be formed. In one example, a disclosed method includes generating PGS fibers by blending PGS prepolymer with a heat resistant synthetic carrier polymer, wherein the blend is electrospun into micro-or nano-fibers, and the PGS prepolymer is cross-linked into PGS with heat without using chemical cross-linkers. In another example, a disclosed method includes electrospinning a PGS and gelatin blend, wherein the PGS and gelatin composition are cross-linked by heat curing without using chemical cross-linkers. In another example, the method includes preparing an electrospinning precursor solution comprising blending PGS prepolymer with with poly(lactic-co-glycolic acid) (PLGA) and a chemical cross-linker; electrospinning the prepared blend; and exposing the electrospun blend to an organic solvent to remove the PLGA.