Brain oxylipin concentrations following hypercapnia/ ischemia: Effects of brain dissection and dissection time

Marie Hennebelle, Adam H. Metherel, Alex P. Kitson, Yurika Otoki, Jun Yang, Kin Sing Stephen Lee, Bruce D. Hammock, Richard P. Bazinet, Ameer Y. Taha

研究成果: Article査読

13 被引用数 (Scopus)

抄録

PUFAs are precursors to bioactive oxylipin metabolites that increase in the brain following CO2-induced hypercapnia/ischemia. It is not known whether the brain-dissection process and its duration also alter these metabolites. We applied CO2 with or without head-focused microwave fixation for 2 min to evaluate the effects of CO2-induced asphyxiation, dissection, and dissection time on brain oxylipin concentrations. Compared with head-focused microwave fixation (control), CO2 followed by microwave fixation prior to dissection increased oxylipins derived from lipoxygenase (LOX), 15-hydroxyprostaglandin dehydrogenase (PGDH), cytochrome P450 (CYP), and soluble epoxide hydrolase (sEH) enzymatic pathways. This effect was enhanced when the duration of postmortem ischemia was prolonged by 6.4 min prior to microwave fixation. Brains dissected from rats subjected to CO2 without microwave fixation showed greater increases in LOX, PGDH, CYP and sEH metabolites compared with all other groups, as well as increased cyclooxygenase metabolites. In nonmicrowave-irradiated brains, sEH metabolites and one CYP metabolite correlated positively and negatively with dissection time, respectively. This study presents new evidence that the dissection process and its duration increase brain oxylipin concentrations, and that this is preventable by microwave fixation. When microwave fixation is not available, lipidomic studies should account for dissection time to reduce these artifacts.

本文言語English
ページ(範囲)671-682
ページ数12
ジャーナルJournal of lipid research
60
3
DOI
出版ステータスPublished - 2019

ASJC Scopus subject areas

  • 生化学
  • 内分泌学
  • 細胞生物学

フィンガープリント

「Brain oxylipin concentrations following hypercapnia/ ischemia: Effects of brain dissection and dissection time」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル