November 3, 2014 13:15 — 1 Comment
New Technology Shows Promise for Treatment of Brain Tumors
A new technology that may assist in the treatment of brain cancer and other neurological diseases is the subject of a recent article in the journal Technology. According to the authors, the current medical use of chemotherapy to treat brain cancer can be inefficient because of the blood-brain-barrier that impedes the delivery of drugs. In the study, the researchers indicated that they have created “a tool for blood-barrier-brain disruption that uses bursts of sub-microsecond bipolar pulses to enhance the transfer of large molecules to the brain.” The new tool, called Vascular Enabled Nanosecond pulse or VEIN pulse, will “reversibly open the blood-brain-barrier to facilitate the treatment of brain cancer.” In the animal study, the VEIN pulse treatments were administered using minimally invasive electrodes inserted into the skull of each of the 18 anesthetized male rats. They varied the pulse duration within a burst, the total number of bursts (90 to 900), and the applied field. A key element of their success was that the pulses alternated in polarity to help eliminate muscle contractions and the need for a neuromuscular blockade. To learn more about the study, click here.


Question: how wide an area has BBB breakdown? Note bulk of most aggressive tumors does not have BBB.
Breakdown of BBB by intraarterial injection has been done for years (Norm Shealy and I wrote about this in cats in 1965; Edward Neuwelt at Univ of Oregon has been doing it clinically for many years). There are distinct limits on what drugs can be used; many that are excluded by BBB are excluded for good reason (they do bad things to brain). Question whether the area produced by electrodes will be more effective for tumor margins than a vascular distribution.
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