Method of preparing biological materials and preparations produced using same
Methods for preparing products containing moisture-sensitive materials, including biological materials such as proteins, peptides or live cells, comprising at least the steps: (i) providing a coating liquid comprising at least one active, a sugar polymer and a water soluble/miscible solvent; (ii) providing a quantity of microparticles comprising at least water soluble gel forming solid particles; (iii) fluidizing said quantity of microparticles within a processing chamber of a of a suitable apparatus to form a fluidized bed of said microparticles; (iv) spraying said coating liquid onto said fluidized bed from beneath the fluidized bed to coat said microparticles therewith under saturated moisture conditions; and (vi) allowing coated microparticles to dry, are described. Also described are compositions and uses.
1. A composition comprising microparticle cores coated with a coating layer comprising a biologically active material and a sugar polymer, wherein the resulting microparticles comprise water-soluble gel forming solid particles selected from two or more of the group consisting of dextrose, starch, gelatin, albumin and polyvinyl pyrrolidone.
2. The composition according to claim 1 , wherein the resulting coated microparticles are coated with an enteric coating, a film coating, a moisture repellent coating, a taste-masking coating, or a combination of any such coatings.
3. The composition of claim 1 , wherein the biologically active material is selected from the group consisting of a protein, a peptide and a cell.
4. The composition of claim 1 , wherein the biologically active material is selected from the group consisting of a hormone, a cytokine, a growth hormone, and a combination of any two or more thereof.
5. The composition of claim 1 , wherein the biologically active material is selected from the group consisting of a human or animal growth hormone, erythropoietin, calcitonin, interferon, interleukin, insulin, and colony stimulating factor.
6. The composition of claim 1 , wherein the biologically active material is a microorganism.
7. The composition of claim 6 , wherein said microorganism is Bifidus or Lactobacilli.
8. The composition of claim 1 , wherein the biologically active material is an anti-diarrhea agent.
9. The composition of claim 1 , wherein the biologically active material is a growth promotant.
10. The composition of claim 1 , wherein said microparticles comprise a member selected from the group consisting of an acrylate, acrylate derivative, albumin, alginate, carbomer, carrageenan, cellulose, cellulose derivatives, dextran, dextrin, gelatine, polyvinylpyrrolidone, and starch.
11. The composition of claim 1 , wherein said composition is in the form of an injectable composition, sublingual tablet, oral tablet, sustained release sublingual tablet, microcapsule, pessaries, preconstituted solid dose for nasal spray or drops, aqueous drops, eye wash or drops, skin washing solutions, or a feed premix.