Platelet-activating factor receptor antagonism improves cerebral recovery after circulatory arrest

Stephen M. Langley, Paul J. Chai, James J. Jaggers, Ross M. Ungerleider

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Background. The aim of this study was to determine the effects of antagonism of platelet-activating factor receptors on cerebral recovery after deep hypothermic circulatory arrest (DHCA). Methods. Fourteen 1-week-old piglets were randomly assigned to either placebo (n = 7), or 10 mg/kg intravenous ginkgolide B (BN52021), a naturally occurring platelet-activating factor receptor antagonist. All piglets had cardiopulmonary bypass, cooling to 18°C, 60 minutes of circulatory arrest followed by 60 minutes of reperfusion and rewarming. Global and regional cerebral blood flow, cerebral oxygen metabolism and renal blood flow were determined at baseline before DHCA and after 60 minutes of reperfusion. Results. Blood flow was significantly reduced in all regions of the brain (p <0.001) and the kidneys (p = 0.02) after DHCA in control animals. Cerebral oxygen metabolism was also significantly reduced after DHCA to 59.2% ± 3.2% of the pre-DHCA value (p = 0.0003). In the ginkgolide B group, recovery of global cerebral blood flow to 60.4% ± 2.8% of pre-DHCA level and of global cerebral oxygen metabolism to 77.1% ± 5.8% of pre-DHCA value were significantly higher than the recovery in the control group (p <0.02). Regional recovery of cerebral blood flow and oxygen metabolism in the gingkolide B group was greatest in the cerebellum and brainstem. Renal blood flow did not decrease significantly after DHCA in the gingkolide B group (p = 0.23). Conclusions. These results suggest that production of platelet-activating factor is increased in the brain after DHCA. Platelet-activating factor receptor antagonism with ginkgolide B before the circulatory arrest period can significantly improve recovery of cerebral blood flow and oxygen metabolism and renal blood flow after DHCA.

Original languageEnglish (US)
Pages (from-to)1578-1585
Number of pages8
JournalAnnals of Thoracic Surgery
Volume68
Issue number5
DOIs
StatePublished - Nov 1999
Externally publishedYes

Fingerprint

Deep Hypothermia Induced Circulatory Arrest
ginkgolide B
Cerebrovascular Circulation
Oxygen
Renal Circulation
Reperfusion
platelet activating factor receptor
Rewarming
Platelet Activating Factor
Regional Blood Flow
Brain
Cardiopulmonary Bypass
Cerebellum
Brain Stem
Placebos

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Surgery

Cite this

Platelet-activating factor receptor antagonism improves cerebral recovery after circulatory arrest. / Langley, Stephen M.; Chai, Paul J.; Jaggers, James J.; Ungerleider, Ross M.

In: Annals of Thoracic Surgery, Vol. 68, No. 5, 11.1999, p. 1578-1585.

Research output: Contribution to journalArticle

Langley, Stephen M. ; Chai, Paul J. ; Jaggers, James J. ; Ungerleider, Ross M. / Platelet-activating factor receptor antagonism improves cerebral recovery after circulatory arrest. In: Annals of Thoracic Surgery. 1999 ; Vol. 68, No. 5. pp. 1578-1585.
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abstract = "Background. The aim of this study was to determine the effects of antagonism of platelet-activating factor receptors on cerebral recovery after deep hypothermic circulatory arrest (DHCA). Methods. Fourteen 1-week-old piglets were randomly assigned to either placebo (n = 7), or 10 mg/kg intravenous ginkgolide B (BN52021), a naturally occurring platelet-activating factor receptor antagonist. All piglets had cardiopulmonary bypass, cooling to 18°C, 60 minutes of circulatory arrest followed by 60 minutes of reperfusion and rewarming. Global and regional cerebral blood flow, cerebral oxygen metabolism and renal blood flow were determined at baseline before DHCA and after 60 minutes of reperfusion. Results. Blood flow was significantly reduced in all regions of the brain (p <0.001) and the kidneys (p = 0.02) after DHCA in control animals. Cerebral oxygen metabolism was also significantly reduced after DHCA to 59.2{\%} ± 3.2{\%} of the pre-DHCA value (p = 0.0003). In the ginkgolide B group, recovery of global cerebral blood flow to 60.4{\%} ± 2.8{\%} of pre-DHCA level and of global cerebral oxygen metabolism to 77.1{\%} ± 5.8{\%} of pre-DHCA value were significantly higher than the recovery in the control group (p <0.02). Regional recovery of cerebral blood flow and oxygen metabolism in the gingkolide B group was greatest in the cerebellum and brainstem. Renal blood flow did not decrease significantly after DHCA in the gingkolide B group (p = 0.23). Conclusions. These results suggest that production of platelet-activating factor is increased in the brain after DHCA. Platelet-activating factor receptor antagonism with ginkgolide B before the circulatory arrest period can significantly improve recovery of cerebral blood flow and oxygen metabolism and renal blood flow after DHCA.",
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