3-Hydroxybutyrate aids the recovery of the energy state from aglycaemic hypoxia of adult but not neonatal rat brain slices

Brooks, Keith J. and Clark, John B. and Bates, Timothy E. (1998) 3-Hydroxybutyrate aids the recovery of the energy state from aglycaemic hypoxia of adult but not neonatal rat brain slices. Journal of Neurochemistry, 70 (5). pp. 1986-1990. ISSN 0022-3042

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Full text URL: http://dx.doi.org/10.1046/j.1471-4159.1998.7005198...

Abstract

The level of phosphocreatine (PCr) and the intracellular pH (pHi) of superfused cortical brain slices from adult or 10-day-old rats were monitored using 31P NMR. When the glucose in the superfusing medium was replaced by 3-hydroxybutyrate (3HB), there was a significant reduction in PCr of the adult but not the neonatal slices. The level of PCr of the adult slices was reduced by a greater amount by aglycaemic hypoxia compared with the neonatal brain slices and pHi was decreased by the same amount. After aglycaemic hypoxia, the levels of PCr of the neonatal slices recovered to the same extent when perfused with glucose or 3HB alone or a mixture of glucose and 3HB. The recovery of the PCr was significantly more in the neonatal than the adult brain slices with glucose alone after aglycaemic hypoxia, whereas pHi returned to control levels in both tissue types and with all substrates. The relative recovery of the PCr of the adult slices after aglycaemic hypoxia was the same with either 3HB or glucose. However, if glucose and 3HB were applied together, recovery of PCr was significantly improved compared with glucose alone.

Item Type:Article
Additional Information:The level of phosphocreatine (PCr) and the intracellular pH (pHi) of superfused cortical brain slices from adult or 10-day-old rats were monitored using 31P NMR. When the glucose in the superfusing medium was replaced by 3-hydroxybutyrate (3HB), there was a significant reduction in PCr of the adult but not the neonatal slices. The level of PCr of the adult slices was reduced by a greater amount by aglycaemic hypoxia compared with the neonatal brain slices and pHi was decreased by the same amount. After aglycaemic hypoxia, the levels of PCr of the neonatal slices recovered to the same extent when perfused with glucose or 3HB alone or a mixture of glucose and 3HB. The recovery of the PCr was significantly more in the neonatal than the adult brain slices with glucose alone after aglycaemic hypoxia, whereas pHi returned to control levels in both tissue types and with all substrates. The relative recovery of the PCr of the adult slices after aglycaemic hypoxia was the same with either 3HB or glucose. However, if glucose and 3HB were applied together, recovery of PCr was significantly improved compared with glucose alone.
Keywords:brain slices, brain, aglycemia, hypoxia
Subjects:A Medicine and Dentistry > A100 Pre-clinical Medicine
B Subjects allied to Medicine > B140 Neuroscience
Divisions:College of Science > School of Life Sciences
ID Code:5308
Deposited By: Timothy Bates
Deposited On:11 Jun 2012 17:39
Last Modified:11 Jun 2012 17:39

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