Methods for blood-brain barrier disruption using electrical energy
The present invention provides engineered tissue scaffolds, engineered tissues, and methods of using them. The scaffolds and tissues are derived from natural tissues and are created using non-thermal irreversible electroporation (IRE). Use of IRE allows for ablation of cells of the tissue to be treated, but allows vascular and neural structures to remain essentially unharmed. Use of IRE thus permits preparation of thick tissue scaffolds and tissues due to the presence of vasculature within the scaffolds. The engineered tissues can be used in methods of treating subjects, such as those in need of tissue replacement or augmentation.
1. A method for delivering an agent to a brain tissue of a subject, the method comprising:
placing first and second electrodes in the brain tissue of the subject;
applying a plurality of electrical pulses through the first and second electrodes, which pulses are capable of:
creating an irreversible electroporation (IRE) decellularization zone, and
causing a disruption of the blood-brain-barrier peripheral to the IRE decellularization zone; and
allowing the agent to be transferred to the brain tissue through the disrupted blood-brain-barrier.
2. The method of claim 1 , wherein the agent is incapable of permeating an intact blood-brain-barrier into the brain tissue.
3. The method of claim 2 , wherein the agent is administered to the subject prior to the applying of the plurality of electrical pulses.
4. The method of claim 2 , wherein the agent is a chemotherapeutic agent.
5. The method of claim 1 , after applying the plurality of electrical pulses, further comprising detecting the IRE decellularization zone and the disrupted blood-brain-barrier.
6. The method of claim 1 , wherein the applying includes applying pulses having a pulse duration of at least 5 microseconds.
7. The method of claim 1 , wherein the applying includes applying pulses having a pulse duration of between 5 and 100 microseconds.
8. The method of claim 1 , wherein the applying includes applying the plurality of pulses in a manner to cause non-thermal IRE of the brain tissue.
9. The method of claim 2 , wherein the agent is administered to the subject after the applying of the plurality of electrical pulses.
10. The method of claim 2 , wherein the agent is administered to the subject during the applying of the plurality of electrical pulses.
11. The method of claim 1 , wherein the plurality of electrical pulses does not cause IRE in the brain tissue that is peripheral to the IRE decellularization zone.
12. The method of claim 1 , wherein the agent is administered systemically to the subject.
13. The method of claim 1 , wherein the brain tissue is malignant tissue.