Docosahexaenoic acid complexed to albumin elicits high-grade ischemic neuroprotection

Ludmila Belayev, Victor L. Marcheselli, Larissa Khoutorova, Elena B. Rodriguez De Turco, Raul Busto, Myron D. Ginsberg, Nicolas G. Bazan

Research output: Contribution to journalArticlepeer-review

112 Scopus citations

Abstract

Background and Purpose - High-dose human albumin therapy is strongly neuroprotective in models of brain ischemia and trauma and is currently being studied in a pilot-phase clinical stroke trial. Among its actions in ischemia, albumin induces the systemic mobilization of n-3 polyunsaturated fatty acids and may help to replenish polyunsaturated fatty acids lost from neural membranes. Methods - We complexed 25% human albumin to docosahexaenoic acid (DHA; 22:6n-3) and compared its neuroprotective efficacy with that of native albumin in rats with 2-hour focal ischemia produced by intraluminal suture-occlusion of the middle cerebral artery. Results - In animals treated with DHA-albumin, 0.63 g/kg, the improvement in neurobehavioral scores at 72 hours significantly exceeded that of other treatment groups, and the extent of histological protection (86% reduction in cortical infarction) was highly significant and tended to surpass the degree of cortical protection produced by native albumin at 1.25 g/kg (65%). DHA-albumin 0.63 g/kg, but not native albumin, also significantly reduced subcortical infarction and markedly diminished brain swelling. Lipidomic analysis of DHA-albumin-treated postischemic brains revealed a large accumulation of the neuroprotective DHA metabolite, 10,17S-docosatriene, in the ipsilateral hemisphere. Conclusions - The high-grade neuroprotection afforded by the DHA-albumin complex at relatively low albumin doses is clinically advantageous in that it might reduce the likelihood of acute intravascular volume overload and congestive heart failure sometimes induced when patients with compromised cardiovascular function are treated with high-dose albumin.

Original languageEnglish (US)
Pages (from-to)118-123
Number of pages6
JournalStroke
Volume36
Issue number1
DOIs
StatePublished - Jan 2005

Keywords

  • Albumins
  • Fatty acids
  • Ischemia
  • Neuroprotection
  • Rats

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Neuroscience(all)

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