Cell delivery system
Baldness or hair loss has been treated using pharmaceutical drugs and/or hair transplant surgery. The present invention relates to an improved method for treating baldness. In one aspect, there is provided a method for inducing hair follicle formation in a dermal layer lying beneath an outer skin surface, comprising delivering inductive dermal sheath cells and/or inductive dermal papilla cells directly into the dermal layer using a controlled delivery device. Delivery of the inductive cells need not be into pre-existing pores. Use of a controlled delivery device for the treatment of baldness is a further aspect of the invention.
1 . A method for inducing hair follicle formation in a dermal layer lying beneath an outer skin surface, comprising delivering inductive dermal sheath cells and/or inductive dermal papilla cells directly into the dermal layer using a controlled delivery device.
2 . (canceled)
3 . The method of claim 1 , wherein the inductive dermal sheath cells and/or inductive dermal papilla cells are not delivered into pre-existing pores.
4 . The method of claim 1 , wherein the controlled delivery device delivers inductive dermal sheath and/or inductive dermal papilla cells in small volumes repeatably, rapidly and consistently.
5 . The method of claim 1 , wherein the inductive dermal sheath and/or inductive dermal papilla cells are delivered in a volume between 0.5 μl and 10 μl, preferably between 1 μl and 2 μl.
6 . The method of claim 1 , wherein the cells remain viable after delivery.
7 . The method of claim 1 , wherein the controlled delivery device is sterilisable.
8 . The method of claim 1 , wherein the inductive dermal sheath cells and/or inductive dermal papilla cells are derived from mesenchymal stem cells and/or mesodermal progenitor cells and/or hematopoietic stem cells and/or embryonic stem cells and/or embryonic carcinoma cells and/or reprogrammed cells.
9 . The method of claim 1 , wherein the inductive dermal sheath cells and/or inductive dermal papilla cells are delivered to a depth from an outer skin surface, the depth corresponding to a position where normal hair follicles form in vitro or in vivo.
10 . The method of claim 9 , wherein the depth is 0.5-4.0 mm into human tissue.
11 . The method of claim 1 , wherein the inductive dermal sheath cells and/or inductive dermal papilla cells are delivered at a given angle within the dermal layer.
12 . The method of claim 1 , wherein the controlled delivery device dispenses in suspension between 1000 and 40000 inductive dermal sheath cells and/or inductive dermal papilla cells per delivery.
13 . The method of claim 1 , wherein the controlled delivery device dispenses inductive dermal sheath cells and/or inductive dermal papilla cells in suspension at a cell density of between 5×10 5 and 4×10 7 cells/ml per delivery.
14 . The method of claim 1 , wherein the controlled delivery device dispenses pre-formed aggregates of inductive dermal sheath cells and/or inductive dermal papilla cells.
15 . The method of claim 14 , wherein one to three pre-formed aggregates are dispensed per delivery.
16 . The method of claim 15 , wherein each of said pre-formed aggregates contain between 1.5×10 3 and 1×10 4 cells.
17 . The method of claim 1 , wherein the inductive dermal sheath cells and/or inductive dermal papilla cells are from a source autologous or allogeneic to the dermal layer.
18 . The method of claim 1 , wherein the controlled delivery device comprises one or more high velocity driven needles, a high pressure fluid delivery system, a tracked injection needle, or is needleless.
19 . The method of claim 1 , wherein the controlled delivery device is a Hamilton syringe with a controlled volume delivery modification.
20 . The method of claim 1 , wherein the controlled delivery device comprises a micropump dispensing mechanism.
21 . The method of claim 1 , which additionally includes one or more steps resulting in the development of a mature hair follicle.
22 - 43 . (canceled)