Details for Patent: 5,834,444

Title:	Hyaluronic acid and salts thereof inhibit arterial restenosis
Abstract:	A method is provided of preventing arterial restenosis of an animal after the arteries have been traumatized. The method comprises the administration of a therapeutically effective non-toxic amount of hyaluronic acid and/or pharmaceutically acceptable salts thereof to the animal to prevent narrowing of the arteries. The form of hyaluronic acid is selected from hyaluronic acid and pharmaceutically acceptable salts thereof having a molecular weight less than 750,000 daltons.
Inventor(s):	Falk; Rudolf Edgar (Toronto, CA), Turley; Eva Anne (Winnipeg, CA), Asculai; Samuel Simon (Toronto, CA)
Assignee:	Hyal Pharmaceutical Corporation (Mississauga, CA)
Filing Date:	Sep 23, 1993
Application Number:	08/125,398
Claims:	1. A method of inhibiting arterial restenosis in a human in need thereof, comprising administering by perfusion or injection to said human, (a) a therapeutically effective, non-toxic amount of hyaluronic acid and/or a pharmaceutically acceptable salt thereof, and (b) a therapeutically effective amount of one or more agents selected from the group consisting of a non-steroidal anti-inflammatory drug (NSAID), vitamin C, a stenosis inhibiting drug, an anti-oxidant, and a free radical scavenger, wherein the hyaluronic acid and/or pharmaceutically acceptable salt thereof has a molecular weight less than 750,000 daltons and greater than 150,000 daltons. 2. The method of claim 1 wherein the administering is done before, during, or after balloon angioplasty. 3. The method of claim 1 wherein the hyaluronic acid and/or pharmaceutically acceptable salt thereof is administered in an amount between about 10 mg and about 3000 mg. 4. A method of inhibiting arterial restenosis following balloon angioplasty in a human in need thereof, comprising administering by perfusion or injection to said human, (a) a therapeutically effective, non-toxic amount of hyaluronic acid and/or a pharmaceutically acceptable salt thereof, (b) a stenosis inhibiting drug, and (c) a therapeutically effective amount of one or more agents selected from the group consisting of a non-steroidal anti-inflammatory drug (NSAID), vitamin C, an anti-oxidant, and a free radical scavenger, wherein the hyaluronic acid or pharmaceutically acceptable salt thereof has a molecular weight less than 750,000 daltons and greater than 150,000 daltons. 5. The method of claim 4 wherein the hyaluronic acid and/or pharmaceutically acceptable salt thereof is administered in an amount between about 10 mg and about 3000 mg. 6. The method of any of claims 1, 2, or 4 or wherein sodium hyaluronate is administered intravenously. 7. A method of inhibiting arterial restenosis following balloon angioplasty in a human in need thereof, comprising administering by perfusion or injection to said human, (a) a therapeutically effective, non-toxic amount of hyaluronic acid and/or a pharmaceutically acceptable salt thereof, and (b) a therapeutically effective amount of one or more agents selected from the group consisting of a non-steroidal anti-inflammatory drug (NSAID), vitamin C, a stenosis inhibiting drug, an anti-oxidant, and a free radical scavenger, wherein the hyaluronic acid or pharmaceutically acceptable salt thereof has a molecular weight less than 750,000 daltons and greater than 150,000 daltons, and wherein the hyaluronic acid and/or pharmaceutically salt thereof is administered in an amount between about 10 mg and about 3000 mg. 8. The method of claim 7 wherein the hyaluronic acid and/or pharmaceutically acceptable salt thereof and the agent(s) are administered intravenously. 9. The method of claim 7 wherein the agent is a stenosis inhibiting drug. 10. The method of claim 7 wherein the amount of the hyaluronic acid and/or pharmaceutically salt thereof is greater than about 200 mg and is less than about 3000 mg.