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 language | English (US) |
|---|---|
| Pages (from-to) | 1578-1585 |
| Number of pages | 8 |
| Journal | Annals of Thoracic Surgery |
| Volume | 68 |
| Issue number | 5 |
| DOIs | |
| State | Published - Nov 1999 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
- Surgery
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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 journal › Article
}
TY - JOUR
T1 - Platelet-activating factor receptor antagonism improves cerebral recovery after circulatory arrest
AU - Langley, Stephen M.
AU - Chai, Paul J.
AU - Jaggers, James J.
AU - Ungerleider, Ross M.
PY - 1999/11
Y1 - 1999/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0032730887&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032730887&partnerID=8YFLogxK
U2 - 10.1016/S0003-4975(99)00998-4
DO - 10.1016/S0003-4975(99)00998-4
M3 - Article
C2 - 10585024
AN - SCOPUS:0032730887
VL - 68
SP - 1578
EP - 1585
JO - Annals of Thoracic Surgery
JF - Annals of Thoracic Surgery
SN - 0003-4975
IS - 5
ER -