Time release protein

• US 5,023,080 A
• Filed: 06/17/1988
• Issued: 06/11/1991
• Est. Priority Date: 06/17/1988
• Status: Expired due to Term

• Current Assignee: Basic Bio Systems, Inc.
• Original Assignee: Basic Bio Systems, Inc.
• Inventors: Gupta, Kashmiri L.
• Primary Examiner(s): PAGE, THURMAN K
• Application Number:
  US07/208,731
• Time in Patent Office: 1,089 Days
• Field of Search: 424/405, 424/491, 424/59, 424/499, 424/60, 424/489, 424/484, 424/485, 424/497
• US Class Current: 424/405
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 25/26 in coated particulate form
• CPC Class Codes: A61K 2800/56 Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms
• CPC Class Codes: A61K 8/0279 Porous; Hollow
• CPC Class Codes: A61K 8/645 Proteins of vegetable origin; Derivatives or degradation products thereof
• CPC Class Codes: A61K 9/1658 Proteins, e.g. albumin, gelatin
• CPC Class Codes: A61L 9/04 using substances evaporated in the air without heating
• CPC Class Codes: A61L 9/042 with the help of a macromolecular compound as a carrier or diluent A61L9/048 takes precedence
• CPC Class Codes: A61Q 17/02 containing insect repellants
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations

Abstract

Disclosed is a porous protein particle for delivering over a period of time an active ingredient impregnated therein, and methods of making and using the same. The protein particles have a median size less than about 50 microns. Active ingredient entrapped in the porous structure is gradually released from the protein particle.

Claims

1. A process for preparing a time release delivery vehicle for delivering an active ingredient over time, comprising the steps of:

(a) providing a biodegradable particulate seed protein material having a porous structure, wherein said particulate is in association with lipid materials naturally occurring in said seed;

(b) removing at least a portion of said lipid material from the particulate to form a substantially dry seed protein having a median particle size sufficiently small that said particulate is in the form of a free flowing powder; and

combining the dry protein with the active ingredient under conditions of agitation so that the active ingredient will permeate the porous structure of the individual particles of the protein, thereby forming a material that will provide sustained release of said active ingredient over a period of at least 20 minutes.

2. A process is in claim 1, further comprising a final step of combining the concentrate with a pharmacologically acceptable excipient.

3. A process as in claim 1, wherein the combining step is performed at an elevated temperature to facilitate permeation of the active ingredient into the pores of the protein particle.

4. A process as in claim 1, further comprising the steps of dissolving the active ingredient in a solvent prior to the combining step, and permitting the solvent to volatilize following the combining step.

5. A process as in claim 1, further comprising the final step of combining the delivery vehicle with a cosmetically acceptable excipient.

6. A process as in claim 1, wherein the active ingredient is an insecticide.

7. A process as in claim 1, wherein the active ingredient is a deodorant.

8. A process as in claim 1, wherein the biodegradable particulate seed protein material comprises a soy protein.

9. A process as in claim 1, wherein the active ingredient is a cleanser.

10. A process as in claim 1, wherein the active ingredient is a pharmaceutical product.

11. A process as in claim 1, wherein the active ingredient is a cosmetic agent.

13. The process of claim 11, wherein the median particle size of said powder is about 50 microns or less.

12. A process for preparing a time release delivery vehicle for delivering an active ingredient over time, comprising the steps of:

providing a biodegradable particulate seed protein having a porous structure, wherein said porous structure is substantially free of water and has a sufficiently small particle size that it is in the form of a free flowing powder and has time release characteristics; and

combining the protein with active ingredient selected from the group consisting of medicinals, pharmaceuticals, pesticides, herbicides, fungicides, volatile materials, cosmetics, deodorants, cleansers, fertilizers, and sunscreens, which active ingredient is in liquid form, so that said active ingredient penetrates into the porous structure of said protein and provides a time release vehicle for said active ingredient suitable to provide sustained release of said active ingredient over a period of at least 20 minutes.