Polymeric treatment compositions

• US 9,351,993 B2
• Filed: 06/13/2013
• Issued: 05/31/2016
• Est. Priority Date: 06/14/2012
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Cruise, Gregory M., Constant, Michael J., Garretson, Joshua
• Primary Examiner(s): Arnold, Ernst V
• Assistant Examiner(s): Song, Jianfeng
• Application Number:
  US13/917,323
• Publication Number:
  US 20130336917A1
• Time in Patent Office: 1,083 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61K 31/78 of acrylic acid or derivatives thereof
• CPC Class Codes: A61K 31/785 Polymers containing nitrogen
• CPC Class Codes: A61K 47/32 Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers , poly(meth)acrylates, or polyvinyl pyrrolidone
• CPC Class Codes: A61K 9/0024 Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue compositions for intravenous administration, normal injectable solutions or dispersions for, e.g. subcutaneous administration A61K9/0019; brain implants A61K9/0085; (coated) prostheses, catheters or stents A61L
• CPC Class Codes: A61L 24/0089 containing inorganic fillers not covered by groups A61L24/0078 or A61L24/0084
• CPC Class Codes: A61L 24/046 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L24/043 takes precedence
• CPC Class Codes: A61L 2430/36 for embolization or occlusion, e.g. vaso-occlusive compositions or devices
• CPC Class Codes: A61P 9/00 Drugs for disorders of the cardiovascular system

Abstract

Compositions are described comprising a polymer; a non-physiological pH solution; and a visualization agent; wherein the polymer is soluble in the non-physiological pH solution and insoluble at a physiological pH. Methods of forming the solutions and polymers are disclosed as well as methods of therapeutic use.

Claims

1. A composition comprising:

a biocompatible polymer comprising;

a first monomer selected from a group consisting of aminopropyl methacrylamide, aminoethyl methacrylamide, N-(3-methylphridine)acrylamide, N-(2-(4-aminophenyl)ethylacrylamide, N-(4-aminobenzyl)acrylamide, N-(2-4-imidazolyl)ethyl)acrylamide and combinations thereof;

a second monomer selected from a group consisting of t-butyl acrylate, t-butyl acrylamide, n-octyl methacrylate, methyl methacrylate, hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, derivatives thereof or combinations thereof;

an aqueous solution with a non-physiological pH; and

a visualization agent;

wherein the visualization agent is an iodinated compound, barium sulfate tantalum, superparamagnetic iron oxide, gadolinium molecules or a combination thereof;

wherein the biocompatible polymer is soluble in the aqueous solution and insoluble at a physiological pH at a treatment site.

2. The composition of claim 1, wherein the visualization agent is a particulate.

3. The composition of claim 1, wherein the visualization agent has a concentration of about 5% to about 65%.

4. The composition of claim 1, wherein the polymer is a reaction product of three different monomers.

5. The composition of claim 1, wherein the non-physiological pH solution is water.

6. The composition of claim 1, wherein the non-physiological pH solution has a pH of less than about 6.

7. The composition of claim 1, wherein the non-physiological pH solution has a pH of greater than about 8.

8. The composition of claim 1, wherein the polymer has a concentration of about 1% w/w to about 35% w/w.

9. A composition comprising:

a first aqueous solution at non-physiological pH;

a polymer comprising;

a first monomer selected from a group consisting of aminopropyl methacrylamide, aminoethyl methacrylamide, N-(3-methylpyridine)acrylamide, N-(2-(4-aminophenyl)ethylacrylamide, N-(4-aminobenzyl)acrylamide, N-(2-4-imidazolyl)ethyl)acrylamide and combinations thereof;

a second monomer selected from a group consisting of t-butyl acrylate, t-butyl acrylamide, n-octyl methacrylate, methyl methacrylate, hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, derivatives thereof or combinations thereof;

wherein the polymer has a concentration of from about 1% to 35% w/w, that is soluble in the first aqueous solution at non-physiological pH and insoluble in a second aqueous solution at physiological pH; and

a particulate visualization agent at a concentration of from about 20% w/w to about 60% w/w, wherein the visualization agent is an iodinated compound, barium sulfate, tantalum, superparamagnetic iron oxide, gadolinium molecules or a combination thereof.