Irreversible electroporation using nanoparticles

• US 8,814,860 B2
• Filed: 06/17/2013
• Issued: 08/26/2014
• Est. Priority Date: 04/29/2008
• Status: Active Grant

• Current Assignee: Virginia Tech Intellectual Properties, Inc.
• Original Assignee: Virginia Tech Intellectual Properties, Inc.
• Inventors: Davalos, Rafael V., Rylander, Marissa N., Arena, Christopher B., Lee, Yong Woo
• Primary Examiner(s): Dvorak, Linda
• Assistant Examiner(s): Ram, Jocelyn D
• Application Number:
  US13/919,640
• Publication Number:
  US 20130281968A1
• Time in Patent Office: 435 Days
• Field of Search: 606 27- 37, 606/41, 606/42, 606 48- 50, 607/101, 607/102, 607/116, 128/898, 604 20- 22
• US Class Current: 606/41
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 2018/00446 Brain
• CPC Class Codes: A61B 2018/00613 Irreversible electroporation reversible electroporation A61N1/327
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/327 for enhancing the absorption properties of tissue, e.g. by electroporation
• CPC Class Codes: C12N 13/00 Treatment of microorganisms or enzymes with electrical or wave energy, e.g. magnetism, sonic waves

Abstract

The present invention provides methods, devices, and systems for in vivo treatment of cell proliferative disorders. The invention can be used to treat solid tumors, such as brain tumors. The methods rely on non-thermal irreversible electroporation (IRE) to cause cell death in treated tumors. In embodiments, the methods comprise the use of high aspect ratio nanoparticles with or without modified surface chemistry.

Claims

1. A method of treating a subject having a neoplasia, the method comprising:

identifying a treatment area in the subject, wherein the treatment area comprises the neoplasia;

providing nanoparticles modified to selectively bind to neoplastic cells of the neoplasia;

administering the nanoparticles to the treatment area in an amount sufficient to permit at least some of the nanoparticles to bind to the neoplastic cells;

positioning at least one electrode into or adjacent to the neoplastic cells; and

applying an electric field to the treatment area by delivering electrical pulses from the at least one electrode to irreversibly electroporate the neoplastic cells.

2. The method of claim 1, wherein the nanoparticles comprise folic acid conjugations.

3. The method of claim 1, wherein the nanoparticles comprise antibody conjugations.

4. The method of claim 1, wherein the nanoparticles comprise a polymer coating.

5. The method of claim 1 further comprising:

identifying the neoplasia presented as any one of;

a leukemia, a non-solid tumor, a solid tumor, and tumors in the brain, bone marrow, liver, prostate, kidney, breast, and pancreas.

6. The method of claim 1, wherein the subject is a human.

7. The method of claim 1 further comprising:

positioning a second electrode into Or adjacent to the neoplastic cells, and applying an electric field to the neoplastic cells by delivering electrical pulses from the second electrode to irreversibly electroporate the neoplastic cells.

8. The method of claim 1 further comprising:

limiting, the electric field, to minimize disruption of or damage to healthy tissue surrounding the neoplastic cells.

9. The method of claim 1 further comprising:

amplifying the electric field to lower the threshold required for inducing irreversible electroporation and enlarging the treatment area.

10. The method of claim 1, wherein the step of administering nanoparticles further comprises administering nanoparticles selected from the group comprising spherical nanoparticles, rod-shaped nanoparticles, fullerenes, endohedral metallofullerenes (EMFs), trimetallic nitride template endohedral metallofullerenes (TNT EMFs), single-walled and multi-walled carbon nanotubes, gold nanorods, silver nanorods, single-walled and multi-walled boron/nitride nanotubes, carbon nanotube peapods, carbon nanohorns, carbon nanohom peapods, liposomes, nanoshells, dendrimers, quantum dots, superparamagnetic nanoparticles, nanorods, polystyrene beads, glass and polymer micro- and nano-spheres, biodegradable micro- and nano-spheres, glass nanospheres, polystyrene particles, polymer nanospheres, gold nanoparticles, silver nanoparticles, carbon nanoparticles, iron nanoparticles, conducting nanoparticles, semi-conducting nanoparticles, cellulose nanoparticles, and insulating nanoparticles, or a combination of two or more of these.

11. The method of claim 1 further comprising:

positioning the nanoparticles such that the particles are parallel or perpendicular to the applied electric field.

12. The method of claim 1 further comprising:

administering the nanoparticles after the step of delivering electrical pulses.

13. A method of treating a subject having a neoplasia, the method comprising:

identifying in the subject a treatment area containing the neoplasia;

administering to the treatment area a plurality of nanoparticles that have been functionalized to selectively target neoplastic cells of the neoplasia such that at least some of the nanoparticles bind to the neoplastic cells;

positioning at least one electrode into or adjacent) the neoplastic cells; and

applying through the at least one electrode a plurality of electrical pulses to the treatment area that have been administered with the functionalized nanoparticles to kill the neoplastic cells.

14. The method of claim 13, wherein the nanoparticles comprise folic acid conjugations.

15. The method of claim 13, wherein the nanoparticles comprise antibody conjugations.

16. The method of claim 13, wherein the nanoparticles comprise a polymer coating.