Claims for Patent: 8,017,390

Summary for Patent: 8,017,390

Title:	Method for the preparation of dermal papilla tissue employing mesenchymal stem cells
Abstract:	A method for the preparation of dermal papilla tissue comprising the step of culturing mesenchymal stem cells in a medium having a specific composition is provided. The method makes it possible to form in vitro a quantity of dermal papilla tissues having hair follicle inducting ability and, accordingly, it can be effectively used for the treatment of alopecia through cell transplantation.
Inventor(s):	Park; Jung-Keug (Seoul, KR), Yoon; Hee-Hoon (Incheon, KR), Yoo; Bo-Young (Seoul, KR), Kim; Young-Jin (Seoul, KR), Shin; Youn-Ho (Daejeon, KR)
Assignee:	Dongguk University Industry-Academic Cooperation Foundation (Seoul, KR)
Application Number:	12/282,760
Patent Claims:	1. A method for the preparation of a dermal papilla tissue, which comprises the steps of: 1) culturing mesenchymal stem cells in a first culture medium, said first culture medium being an animal cell culture medium and containing 600 to 1,900 mg/l of amino acids and 12 to 36 mg/l of vitamins; 2) culturing the cells obtained in step (1) in a second culture medium which contains 2,000 to 3,000 mg/l of amino acids and 40 to 60 mg/l of vitamins, wherein the second culture medium is supplemented with one or more growth factors selected from the group consisting of hepatocyte growth factor, epidermal growth factor and nerve growth factor, and wherein the second culture medium is free of serum; 3) adding trypsin or collagenase to the culture obtained in step (2) to allow a lump of cells to detach from the culture dish and undergo auto-aggregation to form a dermal papilla tissue; and 4) harvesting the dermal papilla tissue obtained in step (3) and culturing the tissue in the second culture medium. 2. The method of claim 1, wherein the mesenchymal stem cells are originated from bone marrow, adipose tissue or umbilical cord. 3. The method of claim 1, wherein the first culture medium is selected from the group consisting of Dulbecco's Modified Eagle Medium (DMEM), DMEM/F-12, F-12, McCoy's 5A, RPMI 1640, Williams' medium E, and Iscove's Modified Dulbecco's Medium). 4. The method of claim 1, wherein the mesenchymal stem cells are cultured in step (1) up to 1 to 20 passage numbers. 5. The method of claim 1, wherein the growth factors are employed in an amount ranging from 1 to 1000 ng/ml. 6. The method of claim 1, wherein the second culture medium comprises 30 to 200 mg/l each of L-arginine, L-asparagine, L-aspartatic acid, L-cystine.2HCl, L-isoleucine, L-leucine, and L-lysine.HCl; 30 to 210 mg/l each of L-phenylalanine, L-tryptophan, and L-tyrosine; 50 to 600 mg/l each of L-alanine, L-glutamic acid, L-glycine, L-histidine, L-methionine, L-proline, L-serine, L-threonine, and L-valine; 0.01 to 2 mg/l each of biotin, D-Ca pantothenate and riboflavin; 3 to 16 mg/l each of choline chloride, folic acid, niacinamide, pyridoxine.HCl, and thiamine.HCl; 10 to 15 mg/l of i-inositol; 0.02 to 0.03 mg/l vitamin B.sub.12; 400 to 600 mg/l of glutamine; 1,500 to 3,000 mg/l of D-glucose; 3,000 to 3,500 mg/l of sodium bicarbonate (NaHCO.sub.3); 2,000 to 2,500 mg/l of HEPES (N-[2-hydroxyethyl] piperazine-N'-[2-ethanesulfonic acid]); 1.0 to 2.0 mM of Ca; 0.5 to 1.0 mM of Mg; 0.25 to 0.7 nM each of Cu, Fe, Mn, and Zn; and 4,000 to 5,000 mg/l of sodium chloride. 7. The method of claim 1, wherein the second culture medium further comprises insulin, transferrin, sodium selenite, hydrocortisone and albumin. 8. The method of claim 1, wherein the dermal papilla tissue is an aggregate consisting of the cells differentiated from the mesenchymal stem cells.

Details for Patent 8,017,390

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Smith & Nephew, Inc.	SANTYL	collagenase	Ointment	101995	06/04/1965		2039-02-26