Methods of attaching a molecule-of-interest to a microtube

Abstract

A method of attaching a molecule-of-interest to a microtube, by co-electrospinning two polymeric solutions through co-axial capillaries, wherein a first polymeric solution of the two polymeric solutions is for forming a shell of the microtube and a second polymeric solution of the two polymeric solutions is for forming a coat over an internal surface of the shell, the first polymeric solution is selected solidifying faster than the second polymeric solution and a solvent of the second polymeric solution is selected incapable of dissolving the first polymeric solution and the second polymeric solution comprises the molecule-of-interest, thereby attaching the molecule-of-interest to the microtube. An electrospun microtube comprising an electrospun shell, an electrospun coat over an internal surface of the shell and a molecule-of-interest attached to the microtube.

1 . A method of attaching a molecule-of-interest to a microtube, the method comprising:
 co-electrospinning two polymeric solutions through co-axial capillaries, wherein a first polymeric solution of said two polymeric solutions is for forming a shell of the microtube and a second polymeric solution of said two polymeric solutions is for forming a coat over an internal surface of said shell,   said first polymeric solution is selected solidifying faster than said second polymeric solution and a solvent of said second polymeric solution is incapable of dissolving said first polymeric solution and wherein said second polymeric solution comprises the molecule-of-interest,   thereby attaching the molecule-of-interest to the microtube.   
     
     
         2 . The method of  claim 1 , wherein said first solvent of said first polymeric solution evaporates faster than said second solvent of said second polymeric solution, and wherein said second solvent of said second polymeric solution is capable of evaporating through said internal surface of said shell. 
     
     
         3 . The method of  claim 1 , wherein said polymer of said first polymeric solution and a polymer of said second polymeric solution are different. 
     
     
         4 . The method of  claim 1 , wherein said electrospun shell comprises pores. 
     
     
         5 . The method of  claim 1  wherein said electrospun shell comprises a polymer selected from the group consisting of poly (e-caprolactone) (PCL), polyamide, poly(siloxane), poly(silicone), poly(ethylene), poly(vinyl pyrrolidone), poly(2-hydroxy ethylmethacrylate), poly(N-vinyl pyrrolidone), poly(methyl methacrylate), poly(vinyl alcohol), poly(acrylic acid), poly(vinyl acetate), polyacrylamide, poly(ethylene-co-vinyl acetate), poly(ethylene glycol), poly(methacrylic acid), polylactide, polyglycolide, poly(lactide-coglycolide), polyanhydride, polyorthoester, poly(carbonate), poly(acrylo nitrile), poly(ethylene oxide), polyaniline, polyvinyl carbazole, polystyrene, poly(vinyl phenol), polyhydroxyacid, poly(caprolactone), polyanhydride, polyhydroxyalkanoate, polyurethane, collagen, albumin, alginate, chitosan, starch, and hyaluronic acid. 
     
     
         6 . The method of  claim 1 , wherein said electrospun coat comprises a polymer selected from the group consisting of poly(acrylic acid), poly(vinyl acetate), polyacrylamide, poly(ethylene-co-vinyl acetate), poly(ethylene glycol), poly(methacrylic acid), polylactide polyglycolide, poly(lactide-coglycolide), polyanhydride, polyorthoester, poly(carbonate), poly(ethylene oxide), polyaniline, polyvinyl carbazole, polystyrene, poly(vinyl phenol), polyhydroxyacid, alginate, starch, hyaluronic acid. 
     
     
         7 . The method of  claim 1 , wherein at least one of electrospun shell and electrospun coat comprises a polymer selected from the group consisting of: collagen, albumin, alginate, chitosan, starch, and hyaluronic acid. elastin, tropoelastin, thrombin, fibronectin, poly(amino acids), poly(propylene fumarate), gelatin, pectin, fibrin, cellulose, oxidized cellulose, chitin, polyethylene, polyethylene terephthalate, poly(tetrafluoroethylene), polycarbonate, and polypropylene, or derivatives thereof. 
     
     
         8 . The method of  claim 1 , wherein a thickness of said shell is from about 100 nm to about 20 micrometer. 
     
     
         9 . The method of  claim 1 , wherein an internal diameter of the microtube is from about 50 nm to about 20 micrometer. 
     
     
         10 . The method of  claim 1 , wherein said microtube is filled with a liquid. 
     
     
         11 . The method of  claim 1 , wherein said molecule-of-interest is attached to said coat over said internal surface of said shell. 
     
     
         12 . The method of  claim 1 , wherein said molecule-of-interest is attached to said shell of the microtube. 
     
     
         13 . The method of  claim 1 , wherein said first polymeric solution further comprises polyethylene glycol (PEG). 
     
     
         14 . The method of  claim 1 , wherein said shell prevents diffusion of the molecule-of-interest therethrough.