Claims for Patent: 8,877,705

Summary for Patent: 8,877,705

Title:	Biomaterial for the controlled delivery of ingredients
Abstract:	The disclosure relates to a biomaterial that comprises an aqueous phase, polymer network, a second polymer included in said disclosure invention more particularly relates to a biomaterial including an aqueous phase and a first polymer network made of a first proteic or saccharidic polymer or a mixture of first proteic and saccharidic polymers, wherein the first polymer network and the aqueous phase define a first gel (A), the biomaterial including: a second proteic or saccharidic polymer or a mixture of the second proteic and saccharidic polymers, either in solution in the aqueous phase of the gel (A) or in the form of a gel (B), and a first enzyme for degrading said second polymer or second polymer network. The disclosure also relates to a method for making biomaterials, and to the uses of the biomaterial particularly for releasing active substances, and to a device for the controlled release of active substances that include the biomaterial. The disclosure can particularly be used in the field of cosmetics and pharmaceuticals.
Inventor(s):	Larreta-Garde; Veronique (L\'Isle Adam, FR), Picard; Julien (Pontoise, FR), Klak; Marie Cecile (Montmorency, FR), Perrin; Sebastien (Maisons-Laffitte, FR), Giraudier; Sebastien (Cergy, FR)
Assignee:	MA.I.A. Woundcare (Neuville sur Oise, FR)
Application Number:	12/742,588
Patent Claims:	1. A biomaterial comprising an aqueous phase and a first protein polymer network comprising gelatin, in which the first protein polymer network and the aqueous phase form a first gel, the biomaterial further comprising: a saccharide polymer comprising hyaluronic acid or alginate, the saccharide polymer being different than the first protein polymer network, and being included in the gel either in solution in the aqueous phase of the gel, or in the form of a second gel; and a first enzyme for degrading the saccharide polymer, the first enzyme being hyaluronidase or alginate lyase. 2. The biomaterial as claimed in claim 1, in which the saccharide polymer is hyaluronic acid. 3. The biomaterial as claimed in claim 2, in which the first enzyme is hyaluronidase. 4. The biomaterial as claimed in claim 1, further comprising a second enzyme different than the first enzyme and capable of degrading the first polymer network, the first polymer network being capable of performing, under the action of the second enzyme, a first gel solution transition. 5. The biomaterial as claimed in claim 4, in which the second enzyme is chosen from the group consisting of collagenase, trypsin, and thermolysin. 6. The biomaterial as claimed in claim 5, in which the biomaterial further comprises a third enzyme different than the first and second enzymes and capable of generating bonds between the first polymers or mixture of first polymers, and the third enzyme being capable of catalyzing a solution/gel transition. 7. The biomaterial as claimed in claim 6, in which the third enzyme is transglutaminase. 8. The biomaterial as claimed in claim 1, in which the first protein polymer network is between 0.1% and 20% by weight, relative to the total weight of the biomaterial. 9. The biomaterial as claimed in claim 1, in which the saccharide polymer is between 0.01% and 20% by weight, relative to the total weight of the biomaterial. 10. The biomaterial as claimed in claim 1, in which an active substance is in solution in the aqueous phase and/or in the saccharide polymer. 11. The biomaterial as claimed in claim 10, in which the active substance is chosen from the group consisting of bacteriostatics, bactericides, dyes, including eosin, dextran blue, methylene blue, azure blue, proteins, saccharides, including hyaluronic acid and alginates, a liposome, a nanoparticle, a micelle, anti-acne agents, anti-allergic agents, anxiolytics, anti-asthmatics, anticancer agents, hypolipemic agents, hormonal contraceptives, antidepressants, antidiabetic agents, antalgics, antiasthenics, antihypertensives, antifungals, antibiotics, sleeping drugs, hormone treatments, anti migraine agents, drugs used to treat excess weight, antiparkinsonian agents, neuroleptics, nonsteroidal anti-inflammatories, ovulation inducers, mucolytics, antitussives, erection inducers and antiulceratives. 12. A device for the controlled release of an active substance comprising the biomaterial as defined in claim 1. 13. The device as claimed in claim 12, in which the device is chosen from the group comprising medical devices, including contact lenses, electrodes, sensors, care devices, dressings, impregnated compresses, bandages, surgical dressings, ophthalmic dressings, dental dressings, suture products, therapy devices, orthopedic articles, surgical implants, patches, transdermal gels, active patches, endoprostheses and implants for soft tissues, devices for tissue engineering, reconstruction materials, devices for cell culture, culture media, and culture supports. 14. The biomaterial as claimed in claim 1, wherein the saccharide polymer comprises alginate, and the first enzyme is alginate lyase.

Details for Patent 8,877,705

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Bausch & Lomb Incorporated	VITRASE	hyaluronidase	Injection	021640	05/05/2004		2027-11-14
Bausch & Lomb Incorporated	VITRASE	hyaluronidase	Injection	021640	12/02/2004		2027-11-14
Amphastar Pharmaceuticals, Inc.	AMPHADASE	hyaluronidase	Injection	021665	10/26/2004		2027-11-14
Akorn, Inc.	HYDASE	hyaluronidase	Injection	021716	10/25/2005		2027-11-14
Smith & Nephew, Inc.	SANTYL	collagenase	Ointment	101995	06/04/1965		2027-11-14