Abstract
The permeability of the blood-brain barrier has been measured using a technique which is independent of blood flow and is sufficiently accurate to monitor the penetration of weakly permeant substances. The permeability of the blood-brain barrier to [ 14C]sucrose has been measured in rats anaesthetised with either urethane or pentobarbitone (Nembutal). The values obtained from urethane-anaesthetised untreated rats were slightly lower, thus demonstrating the suitability of urethane as an anaesthetic for blood-brain barrier experiments. The permeability of the barrier has been measured in rats which had been drinking 7.5% ethanol for 6 months, or had been administered an anaesthetic dose of ethanol, or both. No statistically significant difference was found between the permeability measurements in rats subjected to any of these treatments. Positive controls in which 0.3 ml of a 30% ethanol solution was injected into the internal carotid artery demonstrated the sensitivity of the employed technique. Thus it was found that the blood-brain barrier does not weaken with respect to sucrose when the blood ethanol concentration reaches an anaesthetic level.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
