US20070196663A1 - High-yield activation of polymer surfaces for covalent attachment of molecules - Google Patents

High-yield activation of polymer surfaces for covalent attachment of molecules Download PDF

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US20070196663A1
US20070196663A1 US11/677,576 US67757607A US2007196663A1 US 20070196663 A1 US20070196663 A1 US 20070196663A1 US 67757607 A US67757607 A US 67757607A US 2007196663 A1 US2007196663 A1 US 2007196663A1
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cells
coated substrate
polymer
group
overlayer
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Jeffrey Schwartz
T. Dennes
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Princeton University
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Priority to US12/939,736 priority patent/US9056154B2/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/08—Materials for coatings
    • A61L31/082—Inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14—Macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/30—Inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
    • A61L27/38—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix containing added animal cells
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/005—Ingredients of undetermined constitution or reaction products thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
    • C08H1/00—Macromolecular products derived from proteins
    • C08H1/06—Macromolecular products derived from proteins derived from horn, hoofs, hair, skin or leather
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J189/00—Adhesives based on proteins; Adhesives based on derivatives thereof
    • C09J189/04—Products derived from waste materials, e.g. horn, hoof or hair
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
    • C08J2379/02—Polyamines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31536—Including interfacial reaction product of adjacent layers

Definitions

  • the present invention relates to covalently binding organic materials to the surfaces of polymer substrates by functionalizing the surfaces with linker moieties containing transition metal complexes.
  • the present invention relates to modifying polymer surfaces with organometallic compounds that have functional groups that react with functional groups of the polymer surface.
  • the modified polymer surface can be further reacted with a compound, polymer or oligomer that contains functional groups that are reactive with functional groups of the organometallic compound that remain after reaction with the polymer surface.
  • the present invention further relates to functionalizing polymer surfaces to support cell growth and the attachment of biologically active molecules and other compounds of interest.
  • Bioactive polymeric scaffolds are of increasing importance for use in tissue regeneration in a variety of clinical applications, and a scaffold that supports cell growth is a critical first step in such regeneration.
  • Surface wetting properties of many polymers used as bioscaffolds are not conducive to biointegration, but incorporation of surface functional groups can effect substantial changes in a polymer's wettability while generating reactive sites suitable for attachment of peptides and other biomolecules.
  • the present invention relates to a coated substrate having a polymer surface and an organometallic coating layer formed thereon.
  • the organometallic coating and polymer surface have co-reactive functional groups that are reacted to bond the coating to the surface.
  • the organometallic coating has remaining unreacted functional groups that are reacted with co-reactive functional groups of a subsequently applied compound, oligomer or polymer.
  • the present invention relates to a method of coating a polymer surface, which includes coating an organometallic compound on the polymer surface, wherein the polymer surface and the organometallic coating have co-reactive functional groups; and reacting the functional groups of the organometallic compound with the co-reactive functional groups of the polymer surface to form an organometallic coating on the polymer surface.
  • a compound, oligomer or polymer containing functional groups that react with the remaining unreacted functional groups of the organometallic compound is applied to the organometallic layer and the functional groups of the compound, oligomer or polymer are reacted with the remaining functional groups in the organometallic layer to form an organic coating on the organometallic coating.
  • the present invention provides a novel approach to polymer surface modification that enables high surface density derivatization of polymers with reactive surface moieties containing acidic covalent bonds.
  • the polymers need not contain pendant functional groups with acidic covalent bonds.
  • polymers with exposed amide functionality contain acidic N—H bonds, which can serve as sites for chemical derivatization when appropriately activated.
  • coordination of the carbonyl group to an appropriate metallic center further acidifies the N—H bonds and facilitates derivatization.
  • acidic C—H bonds on polymer surfaces can also serve as sites for chemical derivatization when appropriately activated.
  • coordination of the carbonyl group to an appropriate metallic center further acidifies the C—H bonds and facilitates derivatization.
  • a coated substrate having a polymer surface with exposed reactive functional groups containing acidic covalent bonds and an organometallic coating layer formed thereon and covalently bonded thereto, wherein the organometallic coating layer contains transition metal atoms selected from atoms of Group 4, Group 5 and Group 6 of the Periodic Chart that have been covalently bonded to the polymer surface by reaction of a polyalkoxide or polydialkylamide of the transition metal with the reactive functional groups exposed on the polymer surface. Zirconium and titanium are two examples of such transition metals.
  • reactive functional groups with acidic covalent bonds include, but are not limited to, hydroxyl groups, phenol groups, amide N—H groups, amino groups, imide groups, urethane groups, urea groups, thiol groups, carboxylic acid groups, carboxylic acid ester groups, carboxylic acid amide groups, sulfonic acid groups, acidic C—H groups, and the like. Each of these groups will covalently bond the organometallic coating layers.
  • a coated substrate having a polymer surface with an organometallic coating layer formed thereon and covalently bonded thereto, wherein the organometallic coating layer contains transition metal atoms selected from atoms of Group 4, Group 5 and Group 6 of the Periodic Chart which have been covalently bonded to the polymer surface by reaction of a polyalkoxide or polydialkylamide of the transition metal with the reactive functional groups on the polymer surface, wherein each transition metal atom additionally has covalently bonded to it one or more organic ligands.
  • the present invention provides coated substrates in which up to 40%, up to 60%, up to 75% or up to 100% of the polymer surface has organic groups or ligands bonded thereto. This is accomplished without changing the bulk material properties of the substrate.
  • the percentage of the polymer surface with organic ligands bonded thereto depends on relationship between the size of the organic ligand and the size of the metal complex used to bond the organic ligand to the polymer and is readily apparent to one of ordinary skill in the art guided by the present specification.
  • the present invention thus provides a novel type of interface that enables strong adhesion between a polymer surface and an organic coating.
  • the coating modifies the surface of the polymer making it more hydrophilic or hydrophobic as may be desired.
  • the modification can make the polymer surface more or less receptive to subsequently applied coatings, improving or minimizing the adhesion of the polymer to the subsequently applied coating.
  • the polymer surface can be a polymer coating on an article made from another material, such as glass, silicon dioxide, metal, or another polymer.
  • the polymer surface can also be the surface of a pre-cast polymer article.
  • suitable polymers with reactive functional groups include polyamides, such as nylon, silk, and collagen, polyacrylamides, polyimides, polyurethanes, polyureas, polysulfonamides, polyesters, polysaccharides, such as haluronic acid, methylcellulose and proteoglycans, and the like, and copolymers of any of these polymers.
  • the polymer is a biocompatible polymer and the polymer-coated or polymer-cast article is a medical implant or biological scaffold or porous matrix.
  • the organic ligand can then be a protein, peptide, peptide mimetic, small molecule ligand for a cell surface receptor, or other biologically or pharmaceutically active compound having utility as a coating on a medical implant.
  • the organic ligand can thus promote or prevent cell growth or proliferation, promote or discourage cell adhesion, prevent infection, or prevent or promote blood clotting or adhesion.
  • the polymer is a fabric formed from a woven or non-woven fiber.
  • the fiber can be a natural fiber with exposed functional groups, such as silk, wool, cotton, linen, collagen and the like.
  • the fiber can also be a synthetic fiber with exposed functional groups, such as nylon.
  • the present invention also provides a method by which organic ligands or groups may be covalently bonded to polymer surfaces with reactive functional groups using an organo-metallic interface. Therefore, according to another aspect of the present invention, there is provided a method of forming an organic layer on a polymer surface with reactive functional groups, which method includes the steps of:
  • transition metal dialkylamide or alkoxide layer reacting the transition metal dialkylamide or alkoxide layer with an organic overlayer comprising a compound, oligomer or polymer capable of reacting with unreacted transition metal dialkylamide or alkoxide groups to covalently bond the organic compound, oligomer or polymer to the transition metals.
  • the polymer surface can be provided with the organometallic surface layer by reacting a polymer substrate having reactive functional groups with acidic covalent surface bonds with a polydialkylamide or polyalkoxide of the Group 4, Group 5 or Group 6transition metal having two or more dialkylamide or alkoxide groups, so that an organometallic surface layer is formed, covalently bonded to the polymer surface, and having at least one unreacted dialkylamide or alkoxide group.
  • the method of the present invention thus provides high yield coatings on polymer surfaces with the adhesion properties of physical deposition methods under mild reaction conditions.
  • the coatings of the present invention may be formed at ambient temperatures.
  • the present invention also provides coated implantable medical devices, methods for improving cellular growth and attachment, tissue in-growth and adhesion to tissue for implantable medical devices using the coatings of the invention and the inventive coating methods, and methods for implanting medical devices by first coating them according to the present invention
  • the invention can also be used to make the polymer surface electrically conductive, semi-conductive or electrically insulating making it useful in organic thin film transistors, light emitting devices and electrolytic capacitors.
  • FIG. 1 depicts the reaction of N-hexylacetamide and zirconium tetra(tert-butoxide);
  • FIG. 2 depicts the reaction of nylon-Zr-amide complex with a phosphonic acid and RGDC coupling
  • FIG. 3 depicts the transesterification reaction of nylon-Zr-amide complex and RGDC coupling
  • FIGS. 4 a - 4 c depict fibroblast cell growth on surface embodiments of the invention according to one embodiment of a method of the invention.
  • the coated substrates are formed by reacting a polymer surface having functional groups with acidic covalent bonds that are reactive with other functional groups, specifically transition metal polydialkylamides and polyalkoxides.
  • “reactive groups” on a polymer surface are defined as functional group with acidic covalent bonds.
  • suitable polymer surface reactive functional groups include those having a reactive N—H bond such as amine, amide, imide, urethane and urea groups.
  • other reactive functional groups include hydroxyl, oxy, ether, thiol, carbonyl including keto, ester, free acid and acid anhydride, sulfonic acid and acidic—CH groups.
  • the polymer can be in the form of a molded article, a rigid or flexible film or a coating.
  • suitable polymers containing these groups are polyamines such as polyoxy-alkylene polyamines, polyethers such as polyethylene glycol, polyketones such as PEEK, polyamides such as nylon, polyacrylamides, polyimides, polyesters and polyurethanes such as the reaction product of polymeric polyols with polyisocyanates such as techoflex.
  • the preferred functional groups are groups such as those associated with polyamides.
  • Suitable polyamides include nylons such as Nylon 6. Nylon 4/6, Nylon 6/6, Nylon 6/9, Nylon 6/10, Nylon 6/12, Nylon 12, Nylon 6/66, and the like.
  • the reactive functional groups containing acidic covalent bonds may be either pendant to or between monomeric repeating units of the polymer, a portion of which are exposed at the polymer surface.
  • the organometallic compound used in the practice of the invention is preferably derived from a metal or a metalloid such as selected from Group 3 of the Periodic Chart or a transition metal selected from Group 4, 5 and 6 of the Periodic Chart. Preferred metals are aluminum and transition metals are selected from Group 4 with titanium and zirconium being the most preferred.
  • the organo portion of the organometallic compound contains functional groups that are reactive with the functional groups of the polymer surface.
  • organometallic” compounds are defined as including compounds that do not necessarily contain metal-carbon bonds. Examples of suitable organo groups of the organometallic compound are dialkylamide and alkoxide groups containing from 1 to 18, preferably 2 to 8 carbon atoms.
  • alkoxide groups include ethoxide, propoxide, isopropoxide, butoxide, isobutoxide and tert-butoxide.
  • dialkylamide groups include diethyl amide, dipropyl amide, diisopropyl amide, dibutyl amide, diisobutyl amide and ditert-butyl amide.
  • Reaction may be by transition metal coordination followed by proton transfer to a dialkylamide or alkoxide ligand and loss of an dialkylamine or alkanol, so that an organometallic layer covalently bonds with the polymer surface.
  • the organometallic layer is believed to consist of a transition metal layer in which the dialkylamide or alkoxide groups of the transition metal are covalently bonded to the polymer at the reactive functional group,
  • transition metal dialkylamide or alkoxide will have from two to six dialkylamide or alkoxide groups.
  • Transition metal tetra-alkoxides and tetra-dialkylamides are preferred, with the most preferred transition metal tetra-alkoxide and tetra-dialkylamide being zirconium tetra tert-butoxide and zirconium tetra-diethylamide.
  • At least one of the alkoxide or amide groups reacts with reactive functional groups on the polymer surface to form covalent bonds between the reactive functional groups and the transition metal.
  • the reaction proceeds by proton transfer to a dialkylamide or alkoxide group of a transition metal, producing an equivalent quantity of the corresponding dialkyl amine or alkanol.
  • At least one dialkylamide or alkoxide group does not react and remains available for subsequent reaction with the organic overlayer material.
  • Group 5 transition metals form pentaalkoxides or pentadialkylamides and oxotrialk-oxides or oxotridialkylamides that are suitable for use with the present invention. These compounds can also react by proton transfer where possible to covalently bond the transition metal to the reactive functional group on the polymer surface, producing an equivalent quantity of an alkanol or dialkylamine and leaving at least one unreacted alkoxide or dialkylamide group for subsequent reaction with organic overlayer material.
  • Group 6 transition metals form hexaalkoxides or hexadialkylamides, oxotetra-alkoxides or oxotetradialkylamides and dioxo-dialkoxides or dioxodidialkylamides that are all suitable for use with the present invention. These compounds can also react by proton transfer where possible to covalently bond the transition metal to the reactive functional group on the polymer surface, producing an equivalent quantity of an alkanol or dialkylamine and leaving at least one unreacted alkoxide or dialkylamide group for subsequent reaction with organic overlayer material.
  • transition metal alkoxides dialkylamides suitable for use with the present invention are commercially available. This includes the preferred zirconium tetra (tert-butoxide) and zirconium tetra-diethylamide, which may be obtained from Strem.
  • the transition metal alkoxides and dialkylamides may also be prepared by conventional techniques by reacting a halide or oxo-halide of the selected transition metal, depending on the desired number of alkoxide or dialkylamide groups, with the corresponding alkoxide or dialkylamide of a metal selected from Group 1 or Group 2 of the Periodic Chart.
  • the alkoxides are titanates and zirconates. These compounds can be reactive simple esters, polymeric forms of the esters and chelates that are relatively stable. Examples of various compounds include
  • alkyl ortho esters of titanium and zirconium having the general formula M(OR) 4 , wherein M is selected from Ti and Zr and R is C 1-18 alkyl,
  • polymeric alkyl titanates and zirconates obtainable by condensation of the alkyl ortho esters of (a), i.e., partially hydrolyzed alkyl ortho esters of the general formula RO[-M(OR) 2 O—] x-1 R, wherein M and R are as above and x is a positive integer,
  • titanium chelates derived from ortho titanic acid and polyfunctional alcohols containing one or more additional hydroxyl, keto, carboxyl or amino groups capable of donating electrons to titanium.
  • titanium acylates having the general formula Ti(OCOR) 4-n (OR) n wherein R is C 1-18 alkyl as above and n is an integer of from 1 to 3, and polymeric forms thereof, and
  • the organometallic compound is usually dissolved or dispersed in a diluent.
  • suitable diluents are alcohols such as methanol, ethanol and propanol, aliphatic hydrocarbons, such as hexane, isooctane and decane, ethers, for example, tetrahydrofuran and dialkylethers such as diethylether.
  • adjuvant materials may be present in the organometallic composition. Examples include surfactants and anti-static agents. The adjuvants if present are present in amounts of up to 30 percent by weight based on the non-volatile content of the composition.
  • the concentration of the organometallic compound in the composition is not particularly critical but is usually at least 1.0 micromolar, typically from about 1.0 micromolar to about 100 millimolar, and more typically from about 1.0 micromolar to about 50 millimolar.
  • the organometallic treating composition can be obtained by mixing all of the components at the same time with low shear mixing or by combining the ingredients in several steps.
  • the organometallic compounds are reactive with moisture, and care should be taken that moisture is not introduced with the diluent or adjuvant materials and that mixing is conducted in a substantially anhydrous atmosphere.
  • the organometallic composition is applied to the polymer surface by conventional means such as dipping or spraying.
  • the organometallic compound is then exposed to conditions sufficient to form a polymeric metal oxide coating preferably with unreacted dialkylamide or alkoxide and/or hydroxyl groups. This can be accomplished by depositing the film under conditions resulting in hydrolysis and self-condensation of the alkoxide or dialkylamide. These reactions result in a polymeric coating being formed that provides cohesive strength to the film.
  • the conditions necessary for these reactions to occur is to deposit the film in the presence of water, such as a moisture-containing atmosphere.
  • the resulting film preferably has some unreacted dialkylamide or alkoxide groups and/or hydroxyl groups for subsequent reaction and possible covalent bonding with reactive groups of an overlayer material. Concurrently with the self-condensation reaction, the diluent is evaporated. Depending on the reactivity of the functional groups in the organometallic compound and on the polymer surface, heating may be required to bond the organometallic layer to the substrate. For example, temperatures of about 50 to about 200° C. may be used. However, for readily co-reactive groups, ambient temperatures, that is, about 20° C., may be sufficient.
  • an overlayer can be applied to the organometallic film.
  • Such an overlayer material can be derived from a compound, oligomer or polymer that contains groups that are reactive with the dialkylamide or alkoxide and/or hydroxyl groups.
  • Preferred overlayers are the layers of organic ligands of carboxylic and organophosphorus acids as generally described in U.S. Pat. No. 6,645,644, the disclosure of which is incorporated by reference. Certain organic components can also enhance the non-fouling characteristics of a surface so that cells (e.g., from bacteria, scar tissue, mildew, mold, and other unwanted organisms) do not adhere well to the treated surface.
  • organophosphorus acids or derivative thereof are organophosphoric acids, organophosphonic acids and/or organophosphinic acids including derivatives thereof.
  • derivatives are materials that perform similarly as the acid precursors such as acid salts, acid esters and acid complexes.
  • the organo group of the phosphorus acid may be a monomeric, oligomeric or polymeric group.
  • monomeric phosphorus acids are phosphoric acids, phosphonic acids and phosphinic acids including derivatives thereof.
  • R′ is H.
  • the organic component of the phosphoric acid (R) can be a hydrocarbon and can be aliphatic (e.g., alkyl having 2-20, preferably 6-18 carbon atoms) including a saturated or unsaturated carbon chain (e.g., an olefin), unsubstituted or substituted aliphatic, such as fluoro-substituted, or can be aryl or aryl-substituted moiety. Substitution in the omega position is preferred.
  • Examples of monomeric phosphonic acids are compounds or mixture of compounds having the formula: wherein x is 0-1, y is 1, z is 1-2 and x+y+z is 3.
  • R and R′′ are each independently a radical having a total of 1-30, preferably 6-18 carbons.
  • R′ is H, a metal, such as an alkali metal, for example, sodium or potassium or lower alkyl having 1-4 carbons such as methyl or ethyl.
  • R′ is H.
  • the organic component of the phosphonic acid can be a hydrocarbon and can be aliphatic (e.g., alkyl having 2-20, preferably 6-18 carbon atoms) including a saturated or unsaturated carbon chain (e.g., an olefin), unsubstituted or substituted aliphatic such as fluoro-substituted, or can be an aryl or aryl-substituted moiety. Substitution in the omega position is preferred.
  • Examples of monomeric phosphinic acids are compounds or mixture of compounds having the formula: wherein x is 0-2, y is 0-2, z is 1 and x+y+z is 3.
  • R and R′′ are each independently radicals having a total of 1-30, preferably 6-18 carbons.
  • R′ is H, a metal, such as an alkali metal, for example, sodium or potassium or lower alkyl having 1-4 carbons, such as methyl or ethyl.
  • R′ is H.
  • the organic component of the phosphinic acid (R, R′′) can be a hydrocarbon and can be aliphatic (e.g., alkyl having 2-20, preferably 6-18 carbon atoms) including a saturated or unsaturated carbon chain (e.g., an olefin), an unsubstituted or substituted aliphatic such as fluoro-substituted, or can be an aryl or aryl-substituted moiety. Substitution in the omega position is preferred.
  • organo groups which may comprise R and R′′ include long and short chain aliphatic hydrocarbons, aromatic hydrocarbons and substituted aliphatic hydrocarbons and substituted aromatic hydrocarbons.
  • substituents include carboxyl such as carboxylic acid, hydroxyl, amino, imino, amido, thio, cyano, and halo such as fluoro.
  • organophosphorus acids In addition to the organophosphorus acids mentioned above, oligomeric or polymeric organophosphorus acids resulting from self-condensation of the respective organophosphorus acid may be used.
  • the overlayer material can further include a suitable solvent.
  • a suitable solvent such as an alcohol (e.g., ethanol), tetrahydrofuran, dichloromethane, chloroform, 2:1 by volume ethanol:toluene, acetonitrile and water can be used.
  • concentration of the overlayer material can range from about 0.1 micromolar to as high as the upper limit of the solubility of the overlayer material in a specific solvent, for example, from about 0.1 micromolar to about 100 millimolar, from about 0.1 micromolar to about 10.0 millimolar, for example, about 1.0 millimolar.
  • the solution of the overlayer material can be applied to the organometallic coating using one or more techniques, and allowing the solution to evaporate.
  • the solution can be sprayed (e.g., a few microgram per square centimeter) onto, dropped on, and/or painted on the organometallic coating.
  • the substrate with the organometallic coating can be dipped into the solution.
  • the solution can be applied by doctor blade, reverse roll, die coater, wire bar, knife and blade coaters. Direct gravure, micro gravure and reverse gravure techniques can also be used.
  • Suitable solvents include solvents in which the organic compound is soluble including aqueous buffer solutions, tetrahydrofuran, aceto-nitrile, methylene chloride, chloroform and water, and the like.
  • the substrate will then be removed from the solution, rinsed with an inert solvent such as water, acetonitrile, methanol, tetrahydrofuran or the like and then dried to provide a substrate with a polymer surface having an organic ligand surface layer covalently attached thereto.
  • the transition metal amide or alkoxide may be applied to the polymer surface by vapor deposition.
  • an excess of transition metal amide or alkoxide is employed, and the reaction performed at ambient temperature. With vapor deposition, upon completion of the reaction, the vacuum should once again be maintained to remove excess transition metal alkoxide and alkanol byproduct.
  • the applied layer may optionally be treated to enhance bonding directly to the organometallic coating.
  • the applied layer can be treated with heat and/or electromagnetic radiation, such as microwave radiation (e.g., 2450 MHz or a wavelength of about 12 cm).
  • microwave radiation e.g., 2450 MHz or a wavelength of about 12 cm.
  • the applied layer is exposed to radiant and/or induction heating, for example, to a temperature of 50° C. to about 200° C. (e.g., about 150° C.) for about 30-120 seconds.
  • the heating time may be a function of the temperature used, and the temperature used may be restricted by design considerations and/or materials limitations.
  • the present invention can be looked at as bonding organic ligands or groups to substrates with polymer surfaces having functional groups, for example amide groups.
  • polymer surfaces having functional groups are defined as polymers with functional groups either within or between monomeric repeating units, a portion of which are exposed at the polymer surface, either in the form of a coating or a molded article, and are reactive with the organometallic compound, for example, a transition metal. Reaction may be by transition metal coordination to the functional group. For an amide, this may be followed by N—H proton transfer to an alkoxide ligand and loss of an alkanol, so that an organometallic layer covalently bonds with the amide group on the polymer surface.
  • the reaction of the transition metal complex with the polymer substrate proceeds by coordination of the metal to the functional group of the polymer. This may be followed by the transfer of a proton from the polymer functional to the ligand of the transition metal, forming the corresponding dialkylamine or alkanol and bonding the polymer functional group to the transition metal.
  • the vacuum is maintained in order to draw off any excess of the transition metal or dialkylamine or alkanol byproduct.
  • reaction of the transition metal complex with the organic overlayer proceeds by coordination of the functional group on the organic overlayer to the transition metal. This may be followed by the transfer of a proton from the organic functional to the ligand of the transition metal, forming the corresponding dialkylamine or alkanol and bonding the organic overlayer to the transition metal.
  • the organic compound may also be selected from phosphoric acid and organo-phosphonic acids.
  • phosphoric acid is defined according to its well-understood meaning, H 3 PO 4 .
  • Organicphosphonic acids refers to compounds having the formula H 2 RPO 3 , wherein R is a hydrocarbon ligand with a carbon directly bonded to phosphorus.
  • Overlayers based on organophosphorus acids are covalently bonded as phosphate esters of the organometallic layer transition metal.
  • the phosphate esters may be hydrolyzed to form transition metal polyphosphate coatings on the substrate surface.
  • the phosphate and polyphosphate coatings are rich in hydroxyl groups that are available for further chemical modification.
  • the coated polymer substrates also include organic ligands or groups covalently bonded to the polymer surfaces.
  • organic ligands By reacting organic overlayer materials with the transition metal dialkylamide or alkoxide layer, organic ligands form as a layer on the polymer surface, covalently bonded at the transition metal to the polymer surface.
  • the ability to react the organic overlayer material with the transition metal dialkylamide or alkoxide layer covalently bonded to the polymer surface at ambient temperature is particularly useful for the attach-ment of biologically active ligands such as peptides, proteins, or any other ligand which is deactivated under extreme conditions.
  • biologically active ligands that are covalently attached to the polymer surface of a substrate by an organometallic layer include integrins, integrin receptors, cell attachment mediators, such as peptides containing variations of the Arg-Gly-Asp integrin binding sequence known to enhance cellular attachment, and substances that enhance or exclude particular varieties of cellular or tissue ingrowth.
  • Such substances include, for example, osteoinductive substances, such as bone morphogenic proteins (BMP), and substances that induce cellular growth, proliferation, and/or differentiation such as epidermal growth factor (EGF), fibroblast growth factor (FGF), platelet-derived growth factor (PDGF), insulin-like growth factor (IGF-I and II), TGF- , vascular endothelial growth factor (VEGF) and the like.
  • BMP bone morphogenic proteins
  • EGF epidermal growth factor
  • FGF fibroblast growth factor
  • PDGF platelet-derived growth factor
  • IGF-I and II insulin-like growth factor
  • TGF- vascular endothelial growth factor
  • VEGF vascular endothelial growth factor
  • Other biologically active ligands include SMAD3, AXIN2, ID2, HEME Oxygenase-1 and Nell-1.
  • Antibodies, including monoclonal antibodies, may also be covalently bound to the polymer surface.
  • an active agent (or a combination of active agents) can be bound to the polymer surface of a substrate by the organometallic layer according to the invention in order to accomplish any of a variety of goals.
  • the particular active agent(s) used, as well as the mechanism to chemically and/or physically attach the active agent(s) to the derivatized surface, will obviously depend upon the chemical and/or physical nature of the derivatization of the surface, e.g., its reactivity, its functionality, its surface roughness, etc. Nevertheless, the following list of active agents that are suitable for surface immobilization according to the invention is merely exemplary and should not be construed as being complete.
  • the active agent can include antileukotrienes or leukotriene receptor antagonists (e.g., for B4, C4, D4, and/or E4 leukotriene receptors) including, but not limited to, zafirlukast, montelukast, pranlukast, iralukast, pobilukast, or the like, or sombinations thereof, and/or salts thereof (e.g., Montelukast sodium, which is commercially available under the tradename SINGULAIR®).
  • antileukotrienes or leukotriene receptor antagonists including, but not limited to, zafirlukast, montelukast, pranlukast, iralukast, pobilukast, or the like, or sombinations thereof, and/or salts thereof (e.g., Montelukast sodium, which is commercially available under the tradename SINGULAIR®).
  • the active agent can include antihistamines including, but not limited to, ethanolamines (e.g., diphenhydramine and/or salts including hydro-chloride, dimenhydrinate, carbinoxamine, clemastine and/or salts such as fumarate, bromodiphenhydramine and/or salts such as hydrochloride, phenytoloxamine, doxyl-amine, or the like, or other salts thereof, or combinations thereof), ethylenediamines (e.g., tripelennamine and/or salts such as hydrochloride, pyrilamine and/or salts such as maleate, antazoline and/or salts such as phosphate, methapyriline, or the like, or other salts thereof, or combinations thereof), alkylamines (e.g., chlorpheniramine and/or salts such as maleate, brompheniramine and/or salts such as maleate, dexchlorpheniramine and/or salts such as male
  • the active agent can include antiseptics including, but not limited to, iodine, chlorhexidine acetate, sodium hypochlorite, and calcium hydroxide.
  • the active agent can include steroidal anti-inflammatory agents including, but not limited to, betamethasone, triamcinolone, dexamethasone, prednisone, mometasone, fluticasone, beclomethasone, flunisolide, budesonide, or the like, or salts thereof, or combinations thereof.
  • steroidal anti-inflammatory agents including, but not limited to, betamethasone, triamcinolone, dexamethasone, prednisone, mometasone, fluticasone, beclomethasone, flunisolide, budesonide, or the like, or salts thereof, or combinations thereof.
  • the active agent can include non-steroidal anti-inflammatory agents including, but not limited to, fenoprofen, flurbiprofen, ibuprofen, ketoprofen, naproxen, oxaprozin, diclofenac, etodolac, indomethacin, ketorolac, nabumetone, sulindac, tolmetin, meclofenamate, mefenamic acid, piroxicam, suprofen, or the like, or salts thereof, or combinations thereof.
  • non-steroidal anti-inflammatory agents including, but not limited to, fenoprofen, flurbiprofen, ibuprofen, ketoprofen, naproxen, oxaprozin, diclofenac, etodolac, indomethacin, ketorolac, nabumetone, sulindac, tolmetin, meclofenamate, mefenamic acid, piroxicam
  • the active agent can include decongestants including, but not limited to, ephedrine, phenylpropanolamine, pseudoephedrine, phenylephrine, epinephrine, ephedrine, desoxyephedrine, naphazoline, oxymetazoline, tetrahydrozoline, xylometazoline, propylhexedrine, or the like, or salts thereof, or combinations thereof.
  • decongestants including, but not limited to, ephedrine, phenylpropanolamine, pseudoephedrine, phenylephrine, epinephrine, ephedrine, desoxyephedrine, naphazoline, oxymetazoline, tetrahydrozoline, xylometazoline, propylhexedrine, or the like, or salts thereof, or combinations thereof.
  • the active agent can include mucolytics including, but not limited to, acetylcysteine, dornase alpha, or the like, or salts thereof, or combinations thereof.
  • the active agent can include anticholinergics including, but not limited to, ipratropium, atropine, scopolamine, or the like, or salts thereof, or combinations thereof.
  • the active agent can include non-antibiotic antimicrobials including, but not limited to, taurolidine or the like.
  • the active agent can include mast cell stabilizers including, but not limited to, cromolyn, nedocromil, ketotifen, salts thereof (e.g., sodium), or combinations thereof.
  • mast cell stabilizers including, but not limited to, cromolyn, nedocromil, ketotifen, salts thereof (e.g., sodium), or combinations thereof.
  • the active agent can include one or more active ingredients such as anti-infective agents, anti-inflammatory agents, mucolytic agents, antihistamines, antileukotrienes, decongestants, anticholinergics, antifungals, and combinations of these classes of agents.
  • Anti-infective agents contemplated by the present invention include, but are not limited to antibiotics, anti-virals, non-antibiotic antimicrobials, and antiseptics.
  • Anti-inflammatory agents contemplated by the present invention include, but are not limited to steroidal and non-steroidal anti-inflammatory agents, and mast cell inhibitors.
  • Antifungal agents contemplated by the present invention include, but are not limited to amphotericin B, and azole antifungals. Examples of contemplated antibiotics include, but are not limited to cefuroxime, ciprofloxacin, tobramycin, cefoperazone, erythromycin, and gentamycin.
  • Exemplary anti-infective agents include, but are not limited to, penicillins, cephalosporins, macrolides, ketolides, sulfonamides, quinolones, aminoglycosides, beta lactam antibiotics, and linezolid.
  • Exemplary non-antibiotic antimicrobials include taurolidine.
  • Exemplary steroidal anti-inflammatory agents include glucocorticoids.
  • Exemplary nonsteroidal anti-inflammatory agents include diclofenac.
  • Exemplary mast cell stabilizers include cromolyn and nedcromil sodium.
  • Exemplary mucolytic agents are acetylcysteine and dornase alpha.
  • Exemplary decongestants are phenylephrine, naphazoline, oxymetazoline, tetrahydrozoline and xylometoazoline.
  • Exemplary antihistamines include loratidine.
  • Exemplary antibiotic combinations include cefuroxime and gentamicin.
  • Exemplary anticholinergics include ipratropium, atropine and scopolamine.
  • Exemplary antifungals include amphotericin B, itraconazole, fluconazole, and miconazole.
  • the active agent can include, but are not limited to, anti-inflammatory agents (e.g., alclometasone, amcinonide, amlexanox, balsalazide, betamethasone, celecoxib, choline magnesium, trisalicylate, choline salicylate, chlobetasol, colchicine, cortisone acetate, curcumin, disunite, dexamethasone, diclofenac, diflunisal, etodolac, fenoprofen, fluocinolone, fluometholone, flurandren-olide, flurandrenolide, flurbiprofen, hydrocortisone, ibuprofen, indomethacin, ketoprofen, ketorolac, meclofenamate, mefenamic acid, meloxicam, mesalamine, Methylprednisolone, nabumetone, naproxen, ol
  • the active agent can include, but are not limited to, anti-thrombotic agents such as heparin, heparin derivatives, urokinase, PPack (dextro-phenylalanine proline arginine chloromethylketone), or the like, analogs/derivatives thereof, salts thereof, or combinations thereof; steroidal and non-steroidal anti-inflammatory agents (NSAIDs) such as dexamethasone, prednisolone, cortico-sterone, hydrocortisone and budesonide estrogen, sulfasalazine and mesalamine, salicylic acid, salicylates, ibuprofen, naproxen, sulindac, diclofenac, piroxicam, ketoprofen, diflunisal, nabumetone, etodolac, oxaprozin, indomethacin, or the like, analogs/derivatives thereof, salts thereof, or combinations thereof
  • Exemplary genetic active agents include, but are not limited to, anti-sense DNA and RNA as well as DNA coding for: (a) anti-sense RNA, (b) tRNA or rRNA to replace defective or deficient endogenous molecules, (c) angiogenic factors including growth factors such as acidic and basic fibroblast growth factors, vascular endothelial growth factor, epidermal growth factor, transforming growth factor ⁇ and ⁇ , platelet-derived endothelial growth factor, platelet-derived growth factor, tumor necrosis factor ⁇ , hepatocyte growth factor and insulin-like growth factor, (d) cell cycle inhibitors including CD inhibitors, and (e) thymidine kinase (“TK”) and other agents useful for interfering with cell proliferation.
  • angiogenic factors including growth factors such as acidic and basic fibroblast growth factors, vascular endothelial growth factor, epidermal growth factor, transforming growth factor ⁇ and ⁇ , platelet-derived endothelial growth factor, platelet-derived
  • BMP's bone morphogenic proteins
  • BMP-2 BMP-3, BMP-4, BMP-5, BMP-6 (Vgr-1), BMP-7 (OP-1), BMP-8, BMP-9, BMP-10, BMP-11, BMP-12, BMP-13, BMP-14, BMP-15, and BMP-16.
  • BMP's bone morphogenic proteins
  • Such molecules include any of the “hedgehog” proteins, or the DNA's encoding them.
  • Vectors of interest for delivery of genetic active agents include, but are not limited to, (a) plasmids, (b) viral vectors such as adenovirus, adeno-associated virus, lentivirus, or the like, and (c) non-viral vectors such as lipids, liposomes, cationic lipids, or the like.
  • Cells include cells of human origin (autologous or allogenic), including stem cells, or from an animal source (xenogenic), which can be genetically engineered if desired to deliver proteins of interest.
  • Non-limiting examples of useful antimicrobial agents include: Antiamebics, e.g., Arsthinol, Bialamicol, Carbarsone, Cephaeline, Chlorbetamide, Chloroquine, Chlorphenoxamide, Chlortetracycline, Dehydroemetine, Dibromopropamidine, Diloxanide, Diphetarsone, Emetine, Fumagillin, Glaucarubin, Glycobiarsol, 8-Hydroxy-7-iodo-5-quinoline-sulfonic Acid, Iodochlorhydroxyquin, lodoquinol, Paromomycin, Phanquinone, Polybenzarsol, Propamidine, Quinfamide, Scenidazole, Sulfarside, Teclozan, Tetracycline, Thiocarbamizine, Thiocarbarsone, Tinidazole; Antibiotics, e.g.
  • Amino-glycosides such as Amikacin, Apramycin, Arbekacin, Bambermycins, Butirosin, Dibekacin, Dihydrostreptomycin, Fortimicin(s), Gentamicin, Isepamicin, Kaniamycin, Micronomicin, Neomycin, Neomycin Undecylenate, Netilmicin, Paromomycin, Ribo-stamycin, Sisomicin, Spectinomycin, Streptomycin, Tobramycin, Trospectomycin, and the like), Amphenicols (such as Azidamfenicol, Chloramphenicol, Florfenicol, Thiamphenicol, and the like), Ansamycins (such as Rifamide, Rifampin, Rifamycin, Rifapentine, Rifaximin, and the like), ⁇ -Lactams (e.g., Carbacephems, Loracarbef, Carbapenems (such as Biape
  • 2,4-Diaminopyrimi-dines such as Brodimoprim, Textroxoprim, Trimethoprim, and the like
  • Nitrofurans such as Furaltadone, Furazolium Chloride, Nifuradene, Nifuratel, Nifurfoline, Nifur-pirinol, Nifurprazine, Nifurtoinol, Nitrofirantoin, and the like
  • Quinolones and Analogs such as Cinoxacin, Ciprofloxacin, Clinafloxacin, Difloxacin, Enoxacin, Fleroxacin, Flumequine, Grepafloxacin, Lomefloxacin, Miloxacin, Nadifloxacin, Nadilixic Acid, Norflaxacin, Ofloxacin, Oxolinic Acid, Pazufloxacin, Pefloxacin, Pipemidic Acid, Piromidic Acid, Rosoxacin, Rufloxacin, Sparfloxacin, Temafloxacin
  • antimicrobial agents useful in the present invention include, but are not limited to, Q-lactamase inhibitors (e.g. Clavulanic Acid, Sulbactam, Tazobactam, and the like); Chloramphenicols (e.g.
  • collagen
  • the active agents may include proteins associated with cartilage, such as chondrocalcining protein; proteins associated with dentin, such as phosphophoryn, glycoproteins and Gla proteins; proteins associated with enamel such as amelognin and enamelin; structural proteins such as fibrin, fibrinogen, keratin, tubulin, elastin, and the like; blood proteins, whether in plasma or serum, e.g., serum albumin; non-protein growth factors such as prostaglandins and statins (e.g., Simvastatin, Lovastatin, or the like); or the like; analogs/derivatives thereof; salts thereof; or combinations thereof.
  • cartilage such as chondrocalcining protein
  • proteins associated with dentin such as phosphophoryn, glycoproteins and Gla proteins
  • proteins associated with enamel such as amelognin and enamelin
  • structural proteins such as fibrin, fibrinogen, keratin, tubulin, elastin, and the like
  • blood proteins whether in plasma or serum,
  • the active agent can include amino acids, anabolics, analgesics and antagonists, anesthetics, angiogenesis agents, anti-angiogenetic agents, antihelmintics, anti-adrenergic agents, anti-asthmatics, anti-atherosclerotics, antibacterials, anticholesterolics, anticholinergics, anti-coagulants, antidepressants, antidotes, anti-emetics, anti-epileptic drugs, anti-fibrinolytics, antihistamines, anti-inflammatory agents, antihyper-tensives, antimetabolites, antimigraine agents, antimycotics, antinauseants, antineoplastics, anti-obesity agents, anti-Parkinson agents, antiprotozoals, antipsychotics, antirheumatics, antiseptics, antivertigo agents, antivirals, appetite stimulants, bacterial vaccines, bioflavonoids, calcium channel blockers, capillary stabilizing agents,
  • the active agent can include antimicrobial agents, analgesics, anti-inflammatory agents, counter irritants coagulation modifying agents, diuretics, sympatho-mimetics, anorexics, antacids and other gastrointestinal agents, antiparasitics, antidepressants, antihypertensives, anticholinergics, stimulants, antihormones, central and respiratory stimulants, drug antagonists, lipid-regulating agents, uricosurics, cardiac glycosides, electrolytes, ergot and derivatives thereof, expectorants, hypnotics and sedatives, antidiabetic agents, dopaminergic agents, antiemetics, muscle relaxants, para-sympathomimetics, anticonvul-sants, antihist-amines, beta-blockers, purgatives, antiarrhytmics, contrast materials, radio-pharmaceuticals, antiallergic agents, tranquilizers, vasodilators, antiviral agents, and anti-neo
  • the active agent includes an anti-muscle spasm agent, anti-spasmodic, bone resorption inhibitor, smooth muscle contractile agent, calcium absorption enhancer, muscle relaxant, or a mixture thereof.
  • Suitable anti-muscle spasm agents include, but are not limited to, baclofen, botulinum toxin, carisoprodol, chlorphenesin, chlorzoxazone, cyclobenzaprine, dantrolene, diazepam, metaxalone, methocarbamol, orphenadrine, tizani-dine, and mixtures thereof.
  • Suitable anti-spasmodics include, but are not limited to, atropine, baclofen, dicyclomine, hyoscine, propatheline, oxybutynin, S-oxybutynin, tizanidine, cevim-eline, chlordiazepoxide, hydrochloride, dicyclomine, hyoscine, hyoscyamine, glycopyrrolate, and mixtures thereof.
  • Suitable bone resorption inhibitors include, but are not limited to alendronate, ibandronate, minodronate, risedronate, etidronate, tiludronate, and mixtures thereof.
  • a suitable smooth muscle contractile agent includes, but is not limited to, hyoscine, and mixtures thereof.
  • Suitable calcium absorption enhancers include, but are not limited to, alfacalcidol, calcitriol, and mixtures thereof.
  • Suitable muscle relax-ants include, but are not limited to, baclofen, carisoprodol, chlorphenesin, chlorzoxa-zone, cyclobenzaprine, dantro-lene, diazepam, metaxalone, methocarbamol, orphenadrine, and mixtures thereof.
  • the active agent includes an anti-diuretic, anti-muscle spasm agent, anti-spasmodic, agent for treating urinary incontinence, anti-diarrheal agent, agent for treating nausea and/or vomiting, smooth muscle contractile agent, anti-secretory agent, enzyme, anti-ulcerant, bile acid replacement and/or gallstone solubilizing drug, or a mixture thereof.
  • Suitable anti-diuretics include, but are not limited to, acetazolamide, benzthiazide, bendroflumethazide, bumetanide, chlorthali-done, chlorothiazide, ethacrynic acid, furose-mide, hydrochlorothiazide, hydroflume-thiazide, methyclothiazide, polythiazide, quinetha-zone, spironolactone, triamterene, torsemide, trichlomethiazide, desmopressin, oxytocin, and mixtures thereof.
  • Suitable anti-muscle spasm agents include, but are not limited to, baclofen, botulinum toxin, carisoprodol, chlorphenesin, chlorzoxazone, cyclobenzaprine, dantrolene, diazepam, metaxalone, methocarbamol, orphenadrine, tizanidine, and mixtures thereof.
  • Suitable anti-spasmodics include, but are not limited to, atropine, baclofen, dicyclo-mine, hyoscine, propatheline, oxybutynin, S-oxybutynin, tizanidine, and mixtures thereof.
  • Suitable agents for treating urinary incontinence include, but are not limited to, darifenacin, vamic-amide, detrol, ditropan, imipramine, and mixtures thereof.
  • Suitable anti-diarrheal agents include, but are not limited to, ondansetron, palno-setron, tropisetron, attapulgite, atropine, bismuth, diphenoxylate, loperamide, and mixtures thereof.
  • Suitable agents for treating nausea and/or vomiting include, but are not limited to, alosetron, dolasetron, granisetron, meclizine, metoclopramide, ondansetron, palnosetron, prochloperazine, promethazine, trimethobenzamiode, tropisetron, and mixtures thereof.
  • a suitable smooth muscle contractile agent includes, but is not limited to, hyoscine.
  • Suitable anti-secretory agents include, but are not limited to, esomeprazole, lansoprazole, omeprazole, pantoprazole, rabeprazole, tenetopra-zole, ecabet, misoprostol, teprenone, and mixtures thereof.
  • Suitable enzymes include, but are not limited to, alpha-galactosidase, alpha-L-iduronidase, imiglucerase/alglucerase, amylase, lipase, protease, pancreatin, olsalazine, and mixtures thereof.
  • Suitable anti-ulcerants include, but are not limited to, cimetidine, ranitidine, famotidine, misoprostol, sucralfate, pantopra-zole, lansoprazole, omepra-zole, and mixtures thereof.
  • a suitable bile acid replacement and/or gallstone solubilizing drug includes, but is not limited to, ursodiol.
  • the active agent includes an endocrine modulator, glucose production inhibitor, agent for treatment of type II diabetes, anti-secretory agent, glycolipid, glycoprotein, anti-hyperthyroid agent, thyroid hormone, or a mixture thereof.
  • Suitable endocrine modulators include, but are not limited to, methimazole, voglibose, finasteride, GI198745, liothyronine, glyburide, metformin, nateglinide, ioglitazone, pegvisomant, minoxidil, and mixtures thereof.
  • Suitable glucose production inhibitors include, but are not limited to, acarbose, acetohexamide, chlorpropamide, glipizide, glyburide, metformin, miglitol, nateglinide, pioglitazone, rosiglitazone, tolbutamide, tolazamide, and mixtures thereof.
  • Suitable agents for treatment of type II diabetes include, but are not limited to, acarbose, acetohex-amide, chlorpropamide, glipizide, glyburide, metformin, miglitol, nateglinide, pioglit-azone, rosiglitazone, tolbutamide, tolazamide, and mixtures thereof.
  • Suitable anti-secretory agents include, but are not limited to, esomeprazole, lansoprazole, omep-razole, pantoprazole, rabeprazole, tenetoprazole, ecabet, misoprostol, teprenone, and mixtures thereof.
  • Suitable glycolipids include, but are not limited to imigulcerase, vanco-mycin, vevesca (OGT 918), GMK vaccine, and mixtures thereof.
  • Suitable glycoproteins include, but are not limited to, staphvax, bimosiamose (TBC 1269), GCS-100, heparin, and mixtures thereof.
  • Suitable anti-hyperthyroid agents include, but are not limited to, methimazol, propylthiouracil, and mixtures thereof.
  • the active agent includes a cholesterol-lowering agent, aldo-sterone antagonist, triglyceride-lowering agent, leukotriene receptor antagonist, immuno-modulator or immunogen, glucose production inhibitor, agent for treatment of type II diabetes, bone resorption inhibitor, calcium absorption enhancer, insulin enhancing agent, insulin sensitizer, cytokine, metabolic regulator, mast cell mediator, eosinophil and/or mast cell antagonist, glycolipid, glycoprotein, anti-inflammatory drug, anti-obesity drug, COX (cyclooxygenase) and/or LO (lipoxygenase) inhibitor, or a mixture thereof.
  • Suitable cholesterol-lowering agents include, but are not limited to, atorvastatin, benzofibrate, bezafibrate, cerivastatin, cholestyramine, ciprofibrate, clofibrate, colesevelam, colestipol, ezetimibe, fluvastatin, gemfibrozil, lovastatin, niacin/lovastatin, pravastatin, probucol, rosuvastatin, and simvastatin.
  • a suitable aldosterone antagonist includes, but is not limited to, spironolactone.
  • a suitable triglyceride-lowering agent includes, but is not limited to, fenofibrate.
  • Suitable immunomodulators or immunogens include, but are not limited to, interferon beta 1A, interferon beta 1B.
  • Suitable glucose production inhibitors include, but are not limited to, acarbose, acetohexamide, chlorpropamide, glipizide, glyburide, metformin, miglitol, nateglinide, pioglitazone, rosiglitazone, tolbutamide, and tolazamide.
  • Suitable insulin enhancing agents include, but are not limited to, acamprosate, miglitol, troglitazone, chlorpropamide, glimepiride, glipizide, glyburide, and repagli-nide.
  • a suitable insulin sensitizer includes, but is not limited to, is BRL 49653.
  • Suitable cytokines include, but are not limited to, darbepoetin alfa, epoetin alpha, erythropoietin, and NESP.
  • Suitable metabolic regulators include, but are not limited to, allopurinol and oxypurinol.
  • a suitable eosinophil and/or mast cell antagonists includes, but is not limited to, nedocromil.
  • Suitable anti-inflammatory drugs include, but are not limited to, alosetron, anakinra, beclomethasone, betamethasone, budesonide, clobetasol, celecoxib, cromolyn, desoximetasone, dexametha-sone, epinastic, etanercept, etoricoxib, flunisolide, fluocinonide, fluticasone, formoterol, hydrocortisone, hydroxychloroquine, ibudilast, ketotifen, meloxicam, mesalamine, metho-trexate, methylprednisolone, mometasone, montelukast, nedocromil, olsalazine, prednisone, ramatroban, rofecoxib, salsalate, terbutaline, triamcinolone, valdecoxib, and zafirlukast.
  • Suitable anti-obesity drugs include, but are not limited to, dexedrine, diethylpropion, mazindol, oleoyl-estrone, phentermine, phendimetrazine, and sibutramine.
  • a suitable COX and/or LO inhibitor includes, but is not limited to, is ML-3000.
  • the active agent includes an anti-arrhythmic, anti-hyper-tensive, heart regulator, cardiovascular agent, plaque stabilization agent, vasodilator, anti-anginal, anti-coagulant, anti-hypotensive, anti-thrombotic, drug for treating congestive heart failure, p-FOX (fatty acid oxidation) inhibitor, or a mixture thereof.
  • p-FOX fatty acid oxidation
  • Suitable anti-arrhythmics include, but are not limited to, adenosine, amioda-rone, bepridil, bretylium, digitoxin, digoxin, diltiazem, disopyramide, dofetilide, D-sotolol, flecainide, lidocaine, mexiletine, milrinone, phenyloin, pilsicainide, procain-amide, propafenone, propranolol, quinidine, tocainide, dofetilide, and mixtures thereof.
  • Suitable anti-hypertensives include, but are not limited to, acebutolol, alfuzosin, amlodipine, atenolol, amlodipine/benazepril, barnidipine benazepril, bepridil, betaxolol, bisoprolol, bosentan, candesartan, captopril, cariporide, carvedilol, celiprolol, cilazapril, clonidine, diltiazem, doxazosin, enalapril, eplerenone, eprosartan, esmolol, felodipine, fenoldopam, fosinopril, guanfacine, imidapril, irbesartan, isradipine, labetalol, lercanidipine, lisinopril, losartan, manidipine, methyldopa
  • Suitable heart regulators include, but are not limited to, digoxin, digitoxin, dobut-amine, and mixtures thereof.
  • Suitable cardiovascular agents include, but are not limited to, edaravone, iloprost, levosimendan, molsidomine, tezosentan, tirilazad, YM087, adenosine, avasimibe, fenofibrate, and mixtures thereof.
  • a suitable plaque stabilization agent includes, but is not limited to, avasimibe.
  • Suitable vasodilators include, but are not limited to, buflomedil, cilostazol, dipyridamole, diazoxide, hydralazine, minoxidil, naftidrofuryl, nicorandil, nitroprusside, alprostadil, apomorphine, phentolamine mesylate, sildenafil, tadalafil, vardenifil, and mixtures thereof.
  • Suitable anti-anginals include, but are not limited to, amilodipine, amyl nitrite, atenolol, bepridil, diltiazem, erythrityl tetranitrate, felodipine, isosorbide dinitrate, isradipine, metoprolol, nadolol, nicardipine, nifedipine, nimodipine, pentaerythritol tetranitrate, propranolol, and mixtures thereof.
  • Suitable anti-coagulants include, but are not limited to, abciximab, ardeparin, argatroban, bivalirudin, clopidogrel, dalteparin, danaparoid, desirudin, dipyridamole, enoxaparin, eptifibatide, fondaparinux, H376/95, lepirudin, melagatran, nadroparine, nafamostat mesilate, pentosan, pentoxifylline, reviparin, sarpogrelate, SNAC/SNAD-heparin, ticlopidine, tinzaparin, tirofiban, warfarin, and mixtures thereof.
  • Suitable anti-hypotensives include, but are not limited to, midodrine, dobutamine, fludrocortisone, and mixtures thereof.
  • Suitable anti-thrombotics include, but are not limited to, aspirin, abciximab, enoxaparin, integrelin, ticlopidine, and mixtures thereof.
  • Suitable drugs for treating congestive heart failure include, but are not limited to, amrinone, benazepril, bumetanide, captopril, digitoxin, digoxin, dobutamine, dopamine, enalapril, ethacrynic acid, fosino-pril, furosemide, hydralazine, lisinopril, milrinone, minoxidil, moexipril, quinapril, ramipril, torsemide, and mixtures thereof.
  • a suitable p-FOX inhibitor includes, but is not limited to, ranolazine.
  • the active agent includes an aldosterone antagonist, immunomodulator or immunogen, immunosuppressant, cytokine, leukotriene receptor antagonist, mast cell mediator, eosinophil and/or mast cell antagonist, mucolytic, glucocorti-coid, glycolipid, or a mixture thereof.
  • a suitable aldosterone antagonist includes, but is not limited to, spironolactone.
  • Suitable immuno-suppressants include, but are not limited to, azathioprine, cyclophosphamide, cyclosporine, ERL 080, enlimomab, methotrexate, mitoxan-trone, mycophenolate, mofetil, sirolimus, tacrolimus (FK-506), and mixtures thereof.
  • Suitable mucolytics for use in the buccal sprays of the invention include, but are not limited to, ambroxol, bromhexin, fudostein, acetylcestine, and mixtures thereof.
  • the active compound is a p-FOX (fatty acid oxidation) inhibitor, acetylcholinesterase inhibitor, nerve impulse inhibitor, anti-cholinergic, anti-convulsant, anti-psychotic, anxiolytic agent, dopamine metabolism inhibitor, agent to treat post stroke sequelae, neuroprotectant, agent to treat Alzheimer's disease, neurotransmitter, neurotransmitter agonist, sedative, agent for treating attention deficit disorder, agent for treating narcolepsy, central adregenic antagonist, anti-depression agent, agent for treating Parkinson's disease, benzodiazepine antagonist, stimulant, neurotransmitter antagonist, tranquilizer, or a mixture thereof.
  • p-FOX fatty acid oxidation
  • Suitable acetylcholinesterase inhibitors include, but are not limited to, galantamine, neostig-mine, physostigmine, and edrophonium.
  • Suitable nerve impulse inhibitors include, but are not limited to, levobupivacaine, lidocaine, prilocaine, mepivacaine, propofol, rapacuronium bromide, ropivacaine, tubocurarine, atracurium, doxaurium, miva-curium, pancuronium, vercuronium, pipecuronium, and rocuronium.
  • Suitable anti-cholinergics for use in the buccal sprays of the invention include, but are not limited to, amantadine, ipratropium, oxitropium, and dicycloverine.
  • Suitable anti-convulsants include, but are not limited to, acetazolamide, carbamazepine, clonazepam, diazepam, dival-proex (valproic acid), ethosuximide, lamotrignine acid, levetriacetam, oxcarbazepine, phenol-barbital, phenytoin, pregabalin, primidone, remacemide, trimethadione, topiramate, vigabatrin, and zonisamide.
  • Suitable anti-psychotics include, but are not limited to, amisulpride, aripiprazole bifemelane, bromperidol, clozapine, chlorpromazine, haloperidol, iloperidone loperidone, olanzapine, quetiapine, fluphenazine, fumarate, risperidone, thiothixene, thioridazine, sulpride, and ziprasidone.
  • Suitable anxiolytic agents include, but are not limited to, amitrypti-line, atracurium, buspirone, chlorzoxazone, clorazepate, cisatracurium, cyclobenza-prine, eperisone, esopiclone, hydroxyzine, mirtazapine, mivacurium, pagoclone, sulperide, zaleplon, and zopiclone.
  • Suitable dopamine metabolism inhibitors include, but are not limited to, entacapone, lazebemide, selegiline, and tolcapone.
  • Suitable agents to treat post stroke sequelae include, but are not limited to, glatiramer, interferon beta 1A, interferon beta 1B, estradiol, and progesterone.
  • Suitable neuron-protectants include, but are not limited to, donepezil, memanine, nimodipine, riluzole, rivastigmine, tacrine, TAK147, and xaliproden.
  • Suitable agents to treat Alzheimer's disease include, but are not limited to, carbidopa, levodopa, tacrine, donezepil, rivastigmine, and galantamine.
  • Suitable neurotransmitters include, but are not limited to, acetylcholine, serotonin, 5-hydroxytryptamine (5-HT), GABA, glutamate, aspartate, glycine, histamine, epinephrine, norpinephrine, dopamine, adenosine, ATP, and nitric oxide.
  • Suitable neuron-transmitter agonists include, but are not limited to, almotriptan, aniracetam, atomoxetine, benserazide, bromocriptine, bupropion, cabergoline, citalopram, clomipramine, desipramine, diazepam, dihydroergotamine, doxepin duloxetine, eletriptan, escitalopram, fluvoxamine, gabapentin, imipramine, moclobemide, naratriptan, nefazodone, nefiracetam acamprosate, nicergoline, nortryptiline, paroxetine, pergolide, pramipexole, rizatriptan, ropinirole, sertraline, sibutramine, sumatriptan, tiagabine, trazodone, venlafaxine, and zolmitriptan.
  • Suitable sedatives include, but are not limited to, dexmedetomidine, eszopiclone, indiplon, zolpidem, and zaleplon.
  • Suitable agents for treating attention deficit disorder include, but are not limited to, amphetamine, dextroamphetamine, methyl-phenidate, and pemoline.
  • Suitable agents for treating narcolepsy include, but are not limited to, modafinil and mazindol.
  • a suitable central adregenic antagonist includes, but is not limited to, mesoridazine.
  • Suitable anti-depression agents include, but are not limited to, amitriptyline, amoxapine, bupropion, clomipramine, clomipramine, clorgyline, desipramine, doxepin, fluoxetine, imipramine, isocarbox-azid, maprotiline, mirtazapine, nefazodone, nortriptyline, paroxetine, phenelzine, protriptyline, sertraline, tranylcypromine, trazodone, and venlafaxine.
  • Suitable agents for treating Parkinson's disease include, but are not limited to, amantadine, bromocriptine, carvidopa, levodopa, pergolide, and selegiline.
  • a suitable benzo-diazepine antagonist includes, but is not limited to, flumazenil.
  • a suitable neuron-transmitter antagonist includes, but is not limited, to deramciclane.
  • Suitable stimulants include, but are not limited to, amphetamine, dextroamphetamine, dinoprostone, methylphenidate, methylphenidate, modafinil, and pemoline.
  • a suitable tranquilizer includes, but is not limited to, mesoridazine.
  • the active agent includes a nerve impulse inhibitor.
  • Suitable nerve impulse inhibitors include, but are not limited to levobupivacaine, lidocaine, prilocalne, mep-ivacaine, propofol, rapacuronium bromide, ropivacaine, tubocurarine, atracurium, doxacurium, mivacurium, pancuronium, vecuronium, pipecuronium, rocuronium, and mixtures thereof.
  • the active agent includes an anti-opioid agent.
  • Suitable anti-opioid agents for use in the buccal sprays of the invention include, but are not limited to, naloxone, nalmefene, naltrexone, cholecystokinin, nociceptin, neuropeptide FF, oxytocin, vasopressin, and mixtures thereof.
  • the active agent includes an anti-migraine agent.
  • Suitable anti-migraine agents for use in the buccal sprays of the invention include, but are not limited to, frovatriptan, zolmitriptan, rizatriptan, almotriptan, eletriptan, naratriptan, almotriptan, ergotamine, diethylergotamine, sumatriptan, and mixtures thereof.
  • the active agent includes a pain control agent.
  • Suitable pain control agents for use in the buccal sprays of the invention include, but are not limited to, non-steroidal anti-inflammatory drugs, alfentanil, butorphanol, codeine, dezocine, fentanyl, hydrocodone, hydromorphone, levorphanol, meperidine, methadone, morphine, nalbuphine, oxycodone, oxymorphone, propoxyphene, pentazocine, sufentanil, tramadol, and mixtures thereof.
  • the active agent includes an anesthetic.
  • Suitable anesthetics for use in the buccal sprays of the invention include, but are not limited to, benzo-natate, bupivacaine, desflurane, enflurane, isoflurane, levobupivacaine, lidocaine, mepivacaine, prilocalne, propofol, rapacuronium bromide, ropivacaine, sevoflurane, ketamine, and mixtures thereof.
  • the active agent can include, but is not limited to, cyclosporine, sermorelin, octreotide acetate, calcitonin-salmon, insulin lispro, sumatriptan succinate, clozepine, cyclobenzaprine, dexfenfluramine hydrochloride, glyburide, zidovudine, erythromycin, ciprofloxacin, ondansetron hydrochloride, dimenhydrinate, cimetidine hydro-chloride, famotidine, phenyloin sodium, phenyloin, carboprost thromethamine, carboprost, diphenhydramine hydrochloride, isoproterenol hydrochlor-ide, terbutaline sulfate, terbutaline, theophylline, albuterol sulfate, neutraceuticals (i.e., nutrients with pharmacological action, e.g.,
  • Opioids believed to have at least some ⁇ -opioid receptor agonist activity include, but are not limited to, alfentanil, allylprodine, alphaprodine, anileridine, benzylmorphine, bezitramide, buprenor-phine, butorphanol, clonitazene, codeine, desomorphine, dextromoramide, dezocine, diampr-omide, diamorphone, dihydro-codeine, dihydromorphine, dihydromorphone, dihydroisomor-phine, dimenoxadol, dimephept
  • Non- ⁇ -opioids include, but are not limited to, ORL-1-specific opioid agonists, such as nociceptin, deltorphin, and the like, and mixtures thereof.
  • the opioid includes buprenorphine, pharmaceutically acceptable salts thereof, base forms thereof, fentanyl, pharmaceutically acceptable salts thereof, base forms thereof, oxycodone, pharmaceutically acceptable salts thereof, base forms thereof, and any combination of such opioids and/or their derivatives.
  • the opioid agonist includes hydrocodone, morphine, hydromorphone, oxycodone, codeine, levorphanol, meperidine, methadone, oxymorphone, bupren-orphine, fentanyl, dipipanone, heroin, tramadol, etorphine, dihydroetorphine, butorphanol, levorphanol, pharmaceutically acceptable salts thereof, base forms thereof, and any and all mixtures thereof.
  • the opioid agonist can, in some embodiments, include oxycodone, hydro-codone, fentanyl, buprenorphine, pharmaceutically acceptable salts thereof, base forms thereof, and any and all mixtures thereof.
  • the opioid agonist can, in other embodiments, include buprenorphine, pharmaceutically acceptable salts thereof, base forms thereof, fentanyl, pharmaceutically acceptable salts thereof, base forms thereof, and any combination of such opioids and/or their derivatives.
  • active agents can, in one embodiment, include, but are not limited to: ACE inhibitors; adenohypophyseal hormones; adrenergic neuron blocking agents; adrenocortical steroids; inhibitors of the biosynthesis of adrenocortical steroids; alpha-adrenergic agonists; alpha-adrenergic antagonists; selective alpha-two-adrenergic agonists; androgens; anti-addictive agents; antiandrogens; anti-infectives, such as antibiotics, antimicrobials, and antiviral agents; analgesics and analgesic combinations; anorexics; antihelmintics; antiarthritics; antiasthmatic agents; anticonvulsants; antidepressants; antidiabetic agents; antidiarrheals; antiemetic and prokinetic agents; antiepileptic agents; antiestrogens; antifungal agents; antihistamines; antiinflammatory agents; antimigract
  • another active compound may be added including, but not limited to, flurogestone acetate, hydroxyprogesterone, hydroxyprogesterone acetate, hydroxyprogesterone caproate, medroxy-progester-one acetate, norethindrone, norethindrone acetate, norethisterone, norethynodrel, desogestrel, 3-keto desogestrel, gestadene, levonorgestrel, estradiol, estradiol benzoate, estradiol valerate, estradiol cyprionate, estradiol decanoate, estradiol acetate, ethynyl estradiol, estriol, estrone, mestranol, betamethasone, betametha-sone acetate, cortisone, hydrocortisone, hydrocortisone acetate, corticosterone, fluocinolone
  • another active compound may be added including, but not limited to: a) corticosteroids, e.g., cortisone, hydrocortisone, prednisolone, beclomethasone propionate, dexamethasone, betamethasone, flumethasone, triamcinolone, triamcinolone acetonide, fluocinolone, fluocinolone acetonide, fluocinolone acetate, clobetasol propionate, or the like, or a combination thereof; b) analgesic anti-inflammatory agents, e.g., acetaminophen, mefenamic acid, flufenamic acid, indomethacin, diclofenac, diclofenac sodium, alclofenac, ibufenac, oxyphenbutazone, phenylbutazone, ibuprofen, flurbiprofen, ketoprofen
  • corticosteroids e.g.
  • the active agent can include, but is not limited to, anti-staphylococcal agents (e.g., YSPXTNF, YSPWTNF, YSPWTNF-NH2, GENBANK/AF202641, GENBANK/AF205220, GENBANK/AAG03056, or the like, or combinations thereof).
  • anti-staphylococcal agents e.g., YSPXTNF, YSPWTNF, YSPWTNF-NH2, GENBANK/AF202641, GENBANK/AF205220, GENBANK/AAG03056, or the like, or combinations thereof.
  • Other agents that modulate the production or secretion of bacterial or microbial toxins or virulence factors may also be used as active agents.
  • thiolactones and bacterial toxin regulatory proteins such as RNAIII-inhibiting peptides (RIPs) are classes of active agents.
  • salts may be prepared from pharmaceutically acceptable non-toxic bases.
  • Salts derived from all stable forms of inorganic bases include aluminum, ammonium, calcium, copper, iron, lithium, magnesium, manganese, potassium, sodium, zinc, etc.
  • the salt includes ammonium, calcium, magnesium, potassium, or a sodium salt.
  • Salts derived from pharmaceutically acceptable organic non-toxic bases include salts of primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines and basic ion-exchange resins such as arginine, betaine, caffeine, choline, N,N dibenzylethylenediamine, diethylamine, 2-diethylaminoethanol, 2-dimethylaminoethanol, ethanolamine, ethylene-diamine, N-ethylmorpholine, N-ethylpiperidine, glucamine, glucosamine, histidine, iso-propylamine, lysine, methyl-glucosamine, morpholine, piperazine, piperidine, polyamine resins, procaine, purine, theobromine, triethylamine, trimethylamine, tripropylamine, etc.
  • basic ion-exchange resins such as arginine, betaine, caffeine, cho
  • salts may be prepared from pharmaceutically acceptable non-toxic acids.
  • acids include acetic, benzene-sulfonic, benzoic, camphorsulfonic, citric, ethane-sulfonic, fumaric, gluconic, glutamic, hydrobromic, hydrochloric, isethionic, lactic, maleic, mandelic, methane-sulfonic, mucic, nitric, pamoic, pantothenic, phosphoric, succinic, sulfuric, tartaric, p-toluenesulfonic, etc.
  • the acid includes citric, hydrobromic, maleic, phosphoric, sulfuric, and/or tartaric acids.
  • active agents can be bound directly to the polymer surface of a substrate by the organometallic layer according to the invention
  • many active agents according to the present invention can often be attached to the polymer surface of a substrate via ⁇ , ⁇ -di-functional linkers or spacers bound to the organic overlayer.
  • Such spaces or linkers will often be tailored to the particular active agent(s) used.
  • the - and ⁇ -functional groups of the linkers/spacers can be similar or different, and often are different particularly where release of the active agent(s) is(are) intended (e.g., in vivo).
  • Such attachment (and release) of active agents can be effected by covalent bonding (cleaving), ionic bonding (dissociation), physical transitions of state such as crystallization (melting) or liquid crystalline-type ordering (disordering), hydrogen bonding (dissociation), van der Waals interactions (repul-sions), or the like, or any combination thereof.
  • the linkers/spacers can be of relatively small molecular weight (e.g., less than about 200 g/mol), relatively intermediate molecular weight (e.g., from about 200 to about 2000 g/mol), relatively large molecular weight (e.g., more than about 2000 g/mol), or some combination thereof.
  • linkers/spacers are of relatively intermediate and/or relatively large molecular weight, they can include, but are not limited to, oligomers, polymers, and/or copolymers described above as bioactive moieties or biodegrade-able polymers; additionally or alternately, the linkers/spacers can include, but are not limited to, oligomers, polymers, and/or copolymers having one or more of the following types of repeat units: urethanes, ureas, ethers, ketones, esters, amines, carbonates, amides, saccharides, or the like, or combinations thereof.
  • polyfunctional linkers/spacers can be used to attach active agents to the coatings/derivatized surfaces according to the invention.
  • Such poly-functional linkers/spacers can include, but are not limited to, oligomers, polymers, and/or copolymers that are branched, hyperbranched, dendritic, star-shaped, brushes, combs, block, multiblock, or the like, or any combination thereof.
  • transition metal phosphate esters can also serve as a template for first chemical, then biological growth of bone tissue hydroxyapatite in the implant surface.
  • Surface-bound transition metal phosphate layers insinuate themselves directly into bone tissue hydroxylapatite to make a strong composite seal between the implant surface and the hydroxyapatite.
  • the phosphate may be hydrolyzed to form transition metal polyphosphates having a two-dimensional structure, the layers of which also insinuate themselves directly into bone tissue hydroxyapatite.
  • organophosphonic acid capable of forming a thin film on an organometallic surface is suitable for use with the present invention.
  • the organophosphonic acid will have a hydrocarbon ligand that may be saturated or unsaturated, branched or unbranched, substituted or unsubstituted, and may be aromatic or non-aromatic.
  • Typical hydrocarbon ligands of organophosphonic acids will contain between two and twenty carbon atoms or for example, between three and eighteen carbon atoms. Stearyl ligands, for example, may be used.
  • a preferred class of organophosphorus and organic carboxylic acids are those with omega-functionalized organo groups that can be chemically transformed to react and covalently bond to the aforementioned biologically active and pharmaceutically active compounds.
  • omega functional groups include amino, carboxylate, thiol, hydroxyl, carbonate, ester, carbamate, and amide groups.
  • a preferred application technique involves a two-stage vapor deposition process in which the transition metal alkoxide or dialkylamide is first vapor deposited on the polymer surface.
  • vacuum is applied to remove excess transition metal alkoxide and dialkylamine or alkanol by-product, which is then followed by vapor deposition of the organic overlayer material.
  • the vacuum is then applied to withdraw excess organic compound solution and alkanol or dialkylamine by-product.
  • Suitable substrates with polymer surfaces also include fabrics formed from a woven or non-woven fiber.
  • the fiber can be a natural fiber with exposed functional groups, such as silk, wool, cotton, collagen, linen, and the like.
  • the fiber can also be a synthetic fiber with exposed amide groups, such as nylon.
  • the polymer-coated and polymer-cast substrates of the present invention may be fabricated into scaffolds for tissue engineering and tissue guided regeneration applications, including reconstructive surgery.
  • the scaffolds may also be molded to form external scaffolding for the support of in vitro culturing of cells for the creation of external support organs.
  • the scaffolds may also be used in transplantation as a matrix for dissociated cells.
  • the scaffold structure is typically porous to allow generous cellular ingrowth.
  • the polymer scaffolds may also be molded to form external scaffolding for the support of in vitro culturing of cells for the creation of external support organs.
  • Polymers that are suitable for use as scaffold materials are non-toxic, physiologically compatible, and optionally biodegradable.
  • the polymer must be selected for biocompatibility at the time of implant, and, if biodegradable, the products of its degradation process must also be biocompatible. Additional parameters that play an important role include the mechanical properties of the material, especially its mechanical rigidity. Relatively high rigidity is advan-tageous so that the scaffold can withstand the contractile forces exerted by cells growing within the scaffold. Also important are the thermal properties, such as the glass transition temperature, T g , and the biodegradation kinetics, if degradable, which should match the rate of the healing process.
  • the scaffold functions to mimic the extracellular matrices (ECM) of the body.
  • ECM extracellular matrices
  • the scaffold serves as both a physical support and an adhesive substrate for isolated cells during in vitro culture and subsequent implantation. As the transplanted cell populations grow and the cells function normally, they begin to secrete their own ECM support.
  • the scaffold polymer preferably degrades as the need for an artificial support diminishes.
  • tissue shape is integral to function, requiring the molding of the polymer scaffold into articles of varying thickness and shape. Any crevices, apertures or refinements desired in the three-dimensional structure can be created by removing portions of the matrix with scissors, a scalpel, a laser beam or any other cutting instrument.
  • Scaffold applications include the regeneration of tissues such as nervous, musculoskeletal, cartilaginous, tendenous, hepatic, pancreatic, ocular, integumentary, arteriovenous, urinary or any other tissue forming solid or hollow organs.
  • the scaffold may also be used in transplantation as a matrix for dissociated cells such as chondrocytes or hepatocytes to create a three-dimensional tissue or organ.
  • Any type of cell can be added to the scaffold for culturing and implantation, including cells of the muscular and skeletal systems, such as mesenchymal stem cells, chondrocytes, fibroblasts, osteocytes and osteoblasts, parenchymal cells such as hepatocytes, pancreatic cells (including Islet cells), cells of intestinal origin, and other cells such as exocrine cells, bile duct cells, parathyroid cells, thyroid cells, cells of the adrenal-hypothalmic-pituitary axis, heart muscle cells, kidney epithelial cells, kidney tubular cells, kidney basement membrane cells, nerve cells, neurons, blood vessel cells, endothelial cells, cells forming bone and cartilage, smooth muscle cells, skeletal muscle cells, ocular cells, integumentary cells, keratinocytes and skin cells,
  • the cells are obtained from a suitable donor, or the patient into which they are to be implanted, dissociated using standard techniques and seeded onto and into the scaffold.
  • In vitro culturing optionally may be performed prior to implantation.
  • the scaffold is implanted, allowed to vascularize, then cells are injected into the scaffold.
  • Methods and reagents for culturing cells in vitro and implantation of a tissue scaffold are known to those skilled in the art.
  • the polymer scaffolds can be utilized in vivo as tissue engineering and tissue guided regeneration scaffold in mammals such as primates, including humans, sheep, horses, cattle, pigs, dogs, cats, rats and mice, or in vitro.
  • the polymer-coated and polymer-cast substrates of the present invention may also be fabricated from biocompatible polymers into articles for medical implant applications.
  • the organic ligand bonded to the article surface can be a biologically-or pharmaceutically-active compound having utility as a coating on a medical implant.
  • the polymer-coated and polymer-cast articles are formed into shaped articles such as vascular grafts and stents, bone plates, sutures, implantable sensors, barriers for surgical adhesion prevention, implantable drug delivery devices and other therapeutic agent articles.
  • the same issues related to toxicity and tissue compatibility for tissue scaffold polymers also apply to medical implant polymers.
  • Activated nylon surface 4 was prepared by first casting films of 3 (nylon 6/6; (R ⁇ (CH 2 ) 4 CO; R′ ⁇ (CH 2 ) 6 NH) from 0.1 mM formic acid solution on glass microscope slides that were rinsed copiously in Millipore® water, and evacuated at 10 ⁇ 2 torr for 3 hours. The coated slides were then placed in a deposition chamber that was equipped with two stopcocks for exposure either to vacuum or to vapor of zirconium tetra(tert-butoxide).
  • the chamber was evacuated to 10 ⁇ 3 torr for 30 minutes, and slides of 3 were exposed to vapor of of zirconium tetra(tert-butoxide) (with external evacuation) for 30 seconds followed by 5 min exposure without external evacuation. This cycle was repeated twice, then followed by an additional 10 minutes of exposure without external evacuation.
  • the chamber was then evacuated for 16 hours at 10 ⁇ 3 torr to ensure removal of excess zirconium tetra(tert-butoxide).
  • RGD-modified nylon 7a was prepared by immersing a 4-coated slide in a 0.1 mM solution of phosphonoundecanol (5) in dry THF for 15 min to yield complex 6. Treatment of 6 in a 0.1 mM solution of 3-maleimidopropionic acid N-hydroxysuccinimide ester for 24 hrs under dry N 2 was followed by copious rinsing successively in acetonitrile and Millipore® water and drying in vacuo. As depicted in FIG.
  • either an RGDC or DANSYL-cys-tethered surface (7a or 7b) can be obtained via Michael addition, which results in a complex with a 1:1 ratio of Zr to RGDC or DANSYL-Cys.
  • Immersion of 6 in a 0.1 mM aqueous solution of RGDC at pH 6.5 for 24 hours produced 7a.
  • RGD-derivatized surface 9a ( FIG. 3 ) was prepared by immersing a 4-coated slide in a 0.1 mM solution of 3-maleimidopropionic acid N-hydroxysuccinimide ester in dry acetonitrile for 16 hours to produce 8. Immersion of 8 in a 0.1 mM aqueous solution of RGDC at pH 6.5 for 24 hours produced 9a.
  • the nylon-Zr surface complex was derivatized with the succinimide ester of 3-maleimidopropionic acid directly by transesterification to produce 8, which can result in either an RGDC or DANSYL-Cys-tethered surface (9a or 9b).
  • Complexes 9a and 9b have a 1:2 ratio of zirconium to RGDC or DANSYL-Cys, respectively.
  • Fluorescent molecule-labeled analogues 7b and 9b were prepared as described for 7a and 9a, but a 0.1 mM aqueous solution of N-(5-(dimethylamino)-1-naphthyl-sulfonyl)-cysteine (DANSYL-Cys) was used instead of RGDC ( FIGS. 2 and 3 ).
  • DANSYL-Cys N-(5-(dimethylamino)-1-naphthyl-sulfonyl)-cysteine
  • control films of 3 were prepared by soaking in 0.1 mM DANSYL-cys solution for 24 hrs.
  • a calibration curve of fluorescence intensity versus concentration was measured for DANSYL-Cys solutions from 0.16 to 21 ⁇ M at pH 7.5 and pH 12.
  • the approximate spatial surface coverage by RGD was calculated from its measured surface loading of 0.2 nmol/cm 2 ; assuming an RGD “footprint” of 40 ⁇ 2 (determined using Chem 3D). This corresponds to coverage of about 0.4 cm 2 per cm 2 of surface, or 40%. With-out being bound by theory, it is hypothesized that the percent surface coverage by the organic ligand depends upon the relative sizes of the organic ligand and the transition metal complex.
  • Nylon films (2 cm 2 ) derivatized as 7b and 9b and control films of 3 were immersed in water at pH 7.5 for 7 days at room temperature, and the supernatants were analyzed by fluorescence spectroscopy. The samples were then removed from solution, dried, and immersed in water at pH 12 for 3 hrs, after which the supernatants were again analyzed by fluorescence spectro-scopy. Release of DANSYL groups was measured by fluorescence intensities of supernatants from treated 7b and 9b which were compared to the control sample (3) over this seven-day period. Unreacted DANSYLating reagent desorbed from the nylon in about 3 hours. No release of surface-bound DANSYL material occurred over the next seven days. Thus zirconium-amide surface-bound complexes are stable to hydrolysis under these conditions.
  • NIH 3T3 cells were maintained in Dulbecco's Modified Eagle's Medium (DMEM) with 10% calf serum. Cells were washed with Phosphate-Buffered Saline (PBS) and released from tissue culture dishes using 50 mg/mL trypsin and 2 mg/mL EDTA in PBS. Trypsinization was stopped by washing cells in soybean trypsin inhibitor (Sigma). Cells were resuspended in serum-free DMEM at 5 ⁇ 10 4 cells/mL. Two milliliters of the cell suspension were added to wells containing the nylon coated surfaces, which had been pre-blocked for 1 hr in 1% Bovine Serum Albumin. After 90 minutes, non-adherent cells were removed and replaced with fresh, serum-free DMEM. Cells were fixed, permeabilized, and stained for the focal adhesion protein vinculin at the indicated time points.
  • DMEM Dulbecco's Modified Eagle's Medium
  • PBS Phosphate
  • Fibroblast cell spreading on (a) nylon 3 control at 3 hrs; (b) RGD-modified surface 9a at 3 hrs; and (c) RGD-modified surface 9a at 6 hrs is depicted in FIGS. 4 a - 4 c .
  • Staining shows vinculin, and scale bars are 50 microns.
  • significant numbers of cells attached to the RGDC-modified surface (9a) Cells were well spread on the RGD-modified surface showing many focal adhesions when stained with anti-vinculin antibodies, while the few cells on untreated nylon remained round.
  • Zr complex 2 ( FIG. 1 ) was prepared by treating N-hexylacetamide (0.15 g, 1.0 mmol) with Zr tetra(tert-butoxide) 1 (0.40 g, 1.0 mmol) in dry CH 2 Cl 2 for 1 hour under nitrogen. Solvent and reaction byproducts were removed in vacuo to yield Zr complex 2 in >95% yield as shown by 1 H NMR ([CDCl 3 ]: 0.8 (t, 3H); 1.3 (m, 35H); 1.9 (s, 3H); 3.2 (quartet, 2H)).
  • N-hexylacetamide example was repeated in tetrahydrofuran (THF) at 20 C using methyl N-hexylcarbamate as a model for polyurethanes, succinimide as a model for poly-imides, and N-hexyl p-toluene sulfonamide as a model for polysulfonamides.
  • THF tetrahydrofuran
  • the reaction progress was observed via 1 H NMR and reaction completion was calculated from the reduction in relative integration of the N—H NMR peak in each molecule. All reactions were assumed to proceed via zirconium complex coordination to “carbonyl” oxygen, N—H proton transfer to ligand, and loss of ligand.
  • the succinimide and N-hexyl p-toluene sulfonamide yields were about 90% after 30 minutes.
  • the methyl N-hexyl carbamate yield was about 40% after three hours using a stoichiometric excess of zirconium alkoxide. This is evidence of the ability of transition metal alkoxides or amides to surface-modify the polymers.
  • Examples 7-9 were repeated using dicyclohexylurea as a model for polyurea and tetrakis(diethylamino)zirconium(IV) as the transition metal alkoxide.
  • the yield was about 90% after 30 minutes. This is indicative of the ability of transition metal alkoxides or dialkylamides to surface-modify this polymer.
  • Type 1 collagen from bovine achilles tendon, Aldrich
  • Films of type 1 collagen were cast from a 0.1 M solution in formic acid on glass microscope slides that were sonicated in ethanol, rinsed copiously in Millipore water, and evacuated at 10 ⁇ 1 torr for 3 h.
  • the coated slides were then soaked for 24 hours in Millipore water, and baked at 110° C. for 16 hours to dehydrate them.
  • These collagen slides were placed in a deposition chamber equipped with two stopcocks for exposure either to vacuum or to vapor of of zirconium tetra(tert-butoxide).
  • the chamber was evacuated to 10 ⁇ 3 torr for 30 min, and slides of collagen were exposed to vapor of Zr tetra(tert-butoxide) (with external evacuation) for 30 sec followed by 5 min exposure without external evacuation. This cycle was repeated twice and was then followed by an additional 30 min exposure without external evacuation.
  • the chamber was then evacuated at 10 ⁇ 3 torr for 1 h to ensure removal of excess of zirconium tetra(tert-butoxide), and to give Zr-activated collagen.
  • Collagen was derivatized with 1,12-diphosphonododecane by immersing a Zr-activated collagen slide in a 0.1 mM solution of 1,12-diphosphonododecane in dry THF for 1 h. The surface was rinsed copiously in dry THF to produce 1,12-diphosphonododecane-derivatized collagen.
  • Collagen was derivatized with 11-hydroxyundecylphosphonate by immersing a Zr-activated collagen slide in a 0.1 mM solution of 11-hydroxyundecylphosphonate in dry THF for 1 h. This surface was rinsed copiously in dry THF to produce 11-hydroxyundecylphosphonate-derivatized collagen.
  • RGD-derivatized collagen was prepared by immersing a Zr-activated collagen slide in a 0.1 mM solution of 3-maleimidopropionic acid in dry acetonitrile for 1 h to derivatize the collagen surface with maleimido groups. Immersion of this maleimido-derivatized collagen in a 0.1 mM aqueous solution of RGDC at pH 6.5 for 24 h gave RGD-derivatized collagen.
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