# US 7,744,869 B2 · Methods of treatment using electromagnetic field stimulated mesenchymal stem cells

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- Number: US 7,744,869 B2
- Document ID: US7744869B2
- Status: Granted
- Kind: B2
- Application number: 11/268,696
- Filed: 2005-11-07
- Published: 2006-03-16
- Granted: 2010-06-29
- Earliest claimed: 2003-08-20
- Assignees: Ebi, LLC
- Inventors: Bruce Simon
- Web page: https://patentgrep.com/patent/US7744869B2

## CPC

- C12N 13/00: Treatment of microorganisms or enzymes with electrical or wave energy, e.g. magnetism, sonic waves
- A61P 17/02: for treating wounds, ulcers, burns, scars, keloids, or the like
- A61P 19/00: Drugs for skeletal disorders
- C12N: MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA (microbiological testing media C12Q1/00)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS

## Abstract

Methods of modifying stem cells and compositions of modified stem cells, in particular mesenchymal stem cells, using electric or electromagnetic fields. In various embodiments, the present invention's methods are for the treatment of a human or other mammal subject in need thereof, comprising providing an in vitro culture comprising mesenchymal stem cells, administering an electric stimulation to the in vitro culture, and implanting the mesenchymal stem cells into the subject. Methods also include treatment of a human or other mammal subject, comprising implanting mesenchymal stem cells into the subject, and administering an electric stimulation to the mesenchymal stem cells in situ. Other embodiments include methods of administering electric stimulation in conjunction with growth factors to stem cells.

## Claims

### Claim 1

A method of treatment of a human or other mammalian subject having a bone defect in need of enhanced bone formation, comprising:
implanting mesenchymal stem cells into the subject at the site of said defect,
administering an amount of bone morphogenic protein-2 (BMP-2) at the site of said defect to induce differentiation of said mesenchymal stem cells into osteoblasts, and
administering an electric stimulation comprising a pulsed electromagnetic field to the mesenchymal stem cells in situ,
wherein said electric stimulation potentiates the differentiation of said mesenchymal stem cells induced by said amount of BMP-2, forming bone at the site of said defect, with the result being more efficacious than either administering electrical stimulation or BMP-2 independently of one another.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the mesenchymal stem cells are autologous to said subject.

### Claim 3 (depends on 1)

The method according to claim 1, wherein said stem cells are cultured in vitro prior to said implanting.

### Claim 4 (depends on 1)

The method according to claim 1, further comprising implanting osteoconductive granules at said site.

### Claim 5 (depends on 1)

The method according to claim 1, wherein said defect is a bone disease, fracture, wound, injury, birth defect, spinal fusion, defective cartilage, a site of an orthopedic implant, a degenerated or herniated intervertebral disk, site of intervertebral disk replacement, or spinal cord injury.

### Claim 6 (depends on 2)

The method according to claim 2, further comprising implanting a scaffold material at said site.