In the normal central nervous system (CNS) the intact blood-brain barrier (BBB) plays a protective role, restricting the movement of potentially damaging agents into the brain or spinal cord. This barrier, however, also prevents therapeutic substances from interacting with the CNS. Selective, reversible disruption of the BBB may permit the delivery of therapeutic agents to the CNS. Using high intensity focused ultrasound (HIFU), we have developed a novel method for selectively disrupting the BBB in a reversible, controlled manner. In particular we can selectively target and disrupt the BBB in a particular region of interest (RO1) as small as 1 mm3 in volume that permits flux of a molecular complex 69,500 Daltons in size. Based on this work, we propose further studies on the effect of HIFU on the BBB. These studies include determining the mechanisms of HIFU's effects on the BBB, documenting the duration of BBB disruption, and clarifying which molecules can pass through the disrupted BBB. We believe that HIFU represents a powerful therapeutic tool in the treatment of a variety of CNS diseases.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32NS010897-02
Application #
6402819
Study Section
Special Emphasis Panel (ZRG1-BDCN-2 (02))
Program Officer
Jacobs, Tom P
Project Start
2001-09-01
Project End
Budget Start
2001-09-01
Budget End
2002-08-31
Support Year
2
Fiscal Year
2001
Total Cost
$41,996
Indirect Cost
Name
University of Washington
Department
Neurosurgery
Type
Schools of Medicine
DUNS #
135646524
City
Seattle
State
WA
Country
United States
Zip Code
98195
Mesiwala, Ali H; Farrell, Lindi; Wenzel, H Jurgen et al. (2002) High-intensity focused ultrasound selectively disrupts the blood-brain barrier in vivo. Ultrasound Med Biol 28:389-400