Biphasic Liberation of Arachidonic and Stearic Acids During Cerebral Ischemia
10.1111/j.1471-4159.1985.tb05489.x
Crossref journal-article
Wiley
Journal of Neurochemistry (311)
Abstract

Abstract: The mode of free fatty acid (FFA) liberation from the mouse brain during ischemia was investigated at various times after decapitation and under nizofenone treatment. Normal nonischemic brain FFAs consist mainly of palmitic acid (16:0), stearic acid (18:0), and oleic acid (18:1) with smaller amounts of arachidonic acid (20:4), docosahexaenoic acid (22:6), and others. Postde‐capitative ischemia induced a rapid, biphasic release of 20:4 after a short lag of <30 s. The first phase showed a rapid 6.4‐fold increase within 1 min of decapitation, followed by the second phase involving a slow release at less than one‐fifth the rate of the first phase and lasting for at least 10 min. A similar, but not so marked, biphasic liberation was observed with 18:0. However, all of the other fatty acids (16:0, 18:1, 22:6, and others) were released only in a single phase at a slow rate. The time course for the rapid and specific liberation of 20:4 coincided with the time course for the decrease in brain ATP concentration during ischemia. Pretreatment of the animals with nizofenone resulted in a marked suppression of both FFA liberation and ATP depletion during ischemia. This suppression was particularly noteworthy with 20:4 and 18:0. The present study indicates that there is a specific and rapid liberation of 20:4 and 18:0 in a very early stage of ischemia and that this liberation seems to depend on availability of ATP in the brain. The physiological role of this transient 20:4 liberation during ischemia is discussed.

Bibliography

Yasuda, H., Kishiro, K., Izumi, N., & Nakanishi, M. (1985). Biphasic Liberation of Arachidonic and Stearic Acids During Cerebral Ischemia. Journal of Neurochemistry, 45(1), 168–172. Portico.

Authors 4
  1. Hiroshi Yasuda (first)
  2. Kouji Kishiro (additional)
  3. Noriyoshi Izumi (additional)
  4. Masato Nakanishi (additional)
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Dates
Type When
Created 18 years, 10 months ago (Oct. 5, 2006, 1:06 p.m.)
Deposited 1 year, 10 months ago (Oct. 20, 2023, 12:31 p.m.)
Indexed 1 month, 3 weeks ago (July 7, 2025, 1:25 a.m.)
Issued 40 years, 2 months ago (July 1, 1985)
Published 40 years, 2 months ago (July 1, 1985)
Published Online 18 years, 10 months ago (Oct. 5, 2006)
Published Print 40 years, 2 months ago (July 1, 1985)
Funders 0

None

@article{Yasuda_1985, title={Biphasic Liberation of Arachidonic and Stearic Acids During Cerebral Ischemia}, volume={45}, ISSN={1471-4159}, url={http://dx.doi.org/10.1111/j.1471-4159.1985.tb05489.x}, DOI={10.1111/j.1471-4159.1985.tb05489.x}, number={1}, journal={Journal of Neurochemistry}, publisher={Wiley}, author={Yasuda, Hiroshi and Kishiro, Kouji and Izumi, Noriyoshi and Nakanishi, Masato}, year={1985}, month=jul, pages={168–172} }